BENSC EXPERIMENTAL REPORTS 2003

Hahn-Meitner-lnstitut Berlin DE04F7266

Berlin Neutron Scattering Center

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BENSC EXPERIMENTAL REPORTS 2003

BENSCEXPERIMENTAL REPORTS

2003

edited by

Y. Kirschbaum, M. Tovar, D. Bischoffand R. Michaelsen


Hahn-Meitner-lnstitut Berlin

April 2004

Berichte des Hahn-Meitner-Instituts Berlin

HMI - B 595

ISSN 0936 - 0891

Cover picture:

Field distorted magnetic spiral structure of CsCuCI3

From measurements at the triple axis spectrometer E1 the distortion of the uniform spiral by amagnetic field H could be obtained: The spin reduction present at zero field due to thefrustration on the triangular lattice is lifted for the spins pointing along the field while the size ofthe ordered spins opposite to the applied field is reduced even more. In addition spins along Hmove together and spins opposite to H spread apart.

(For further details please see experimental reports on page 4 and the report ofN.Ster, U. Schotte, A. Hoser, M. Meiner, in the Proceedings of the ECNS Montpellier, 2003)

The cover was designed by Digital Recording, Schwedenstrasse 9, D-13359 Berlin, http://www.dire.de

Editorial:

The Berlin Neutron Scattering Center(BENSC) is a department of theHahn-Meitner-lnstitut Berlin GmbH.BENSC develops and runs the NeutronScattering Instruments at the BerlinResearch Reactor BER II and isresponsible for the service to externalusers.The Hahn-Meitner-Institut-Berlin in derHelmholtz-Gemeinschaft (HMI) is anational research institution financed bythe Federal Republic of Germany andthe City State of Berlin.

Address:

Berlin Neutron Scattering CenterBENSCThe Scientific SecretaryDr. Rainer MichaelsenHahn-Meitner-lnstitutGlienicker Strasse 100D - 14109 Berlin (Wannsee)

Phone: +49 - 30 - 8062 3043, -2304

Fax: +49 - 30 - 8062 2523

Email: [email protected]

Net: http://www.hmi.de/bensc

CONTENTS

Introduction

List of BENSC Instruments

How to apply for BENSC Beam Time

Acknowledgement for Support by the European Commission

List of Contributed Reports

IV

VI

VIII

IX

XI

Part 1: EXPERIMENTAL REPORTS 2003

Magnetism

Magnetic Structure and Phase Transitions

Magnetic Thin Films

Structure

Chemical Structure

Structural Excitations

Soft Matter

Biology

Material Science and Industrial Applications

Development of Instruments and Methods

Fundamental Physics and Others

1

89

94

125

1

94

131

158

181

213

234

Part II: LIST OF BENSC PUBLICATIONS

Papers 2003 and supplement 2002 242

Theses 2003 254

AUTHOR INDEX 255

III

Introduction

The present volume contains 237 BENSC Ex-perimental Reports - 170 from external usersand 67 from BENSC staff members - and givesan overview on the experimental work carried outon BENSC during the year 2003.

BENSC User Service

BENSC is open to both, the national and theinternational user community, whereby about 70percent of the beam time is available to externalusers; 20% for long term collaborating groupsfrom German universities and other researchinstitutions and 50 % for peer reviewed shortterm projects.

Detailed descriptions of all essential BENSCneutron scattering instruments are available -and updated - on the BENSC Webpage.

http://www.hmi.de/bensc/instrumentationA colour printed version (brochure HMI-B 577) ison the market since March 2001 and availableon request.

BENSC puts special emphasis on sample envi-ronment under extreme conditions: high fields,high pressure, high, low and ultra low tempera-tures. The sample environment group has pub-lished a detailed technical handbook on BENSCsample environment. The handbook is updatedcontinuously and available in the INTERNETunder

http://www.hmi.de/bensc/sample-env/home.html

Scientific Selection Panel

The short term project beam time allocations forthe scheduled instruments are established on asemi-annual basis in collaboration with a scien-tific selection panel, the "user committee'. The2003 beam time quota for the short term projectsof the external user groups were allocated at twouser committee sessions in November 2002 andMay 2003. Twelve external and two in-housecommittee members have been involved:

External members:Prof. Dr. P. Baglioni

Univ. Firenze, ItalyProf. Dr. G. Decher

Univ. Strasbourg, FranceDr. M. Enderie

ILL Grenoble, FranceDr. Bela Farago

ILL Grenoble, FranceProf. Dr. M. Lerch

Techn. Univ. Berlin, GermanyProf. Dr. M. Loewenhaupt

Techn. Univ. Dresden, GermanyDr. R. May

ILL Grenoble, FranceProf. Dr. G. Renger

Techn. Univ. Berlin, GermanyDr. L. Pintschovius

FZ Karlsruhe, Germany / LLB Saclay, FranceProf. Dr. V. Sechovsky

Charles Univ. Prague, Czech RepublicProf. Dr. J. Texeira

CEA/CNRS/LLB Saclay, FranceProf. Dr. B. Toudic

Univ. Rennes I, FranceInternal members:

Prof. Dr. F. MezeiHMI-Berlin

Dr. H.A. GrafHMI-Berlin

Support for European Access to BENSCfrom the European Commission

The access of European research groups toBENSC has been generously supported by theEuropean Community under the Access to Re-search Infrastructures action of the ImprovingHuman Potential Programme (IHP). The EUsupport under IHP was available for groups fromEuropean Member States as well as for groupsfrom the Associated States; for groups fromSwitzerland slightly modified rules applied. Aslisted on page IX, an important proportion of thecontributions in this volume report on EU sup-ported experiments.

The "European Access to BENSC" action turnedout to be very successful. For the 4 years period2000-2003 our IHP files include

330 IHP supported projects, with700 visits of European users and

2213 neutron instrument days delivered.

The share of these BENSC users in the numberof BENSC publications in high-ranking journals issuperproportionally high.

Therefore we are happy to inform our usercommunity that the EU support for BENSC ac-cess will be continued under the 6th EU Frame-work Programme (FP6).

IV

Strong Representation of BENSC Usersat the ECNS in Montpellier

Not unexpectedly, the users and staff membersof BENSC have been extremely active partici-pants at the 3rd European Conference on Neu-tron Scattering, Montpellier, Sept. 2003:

They presented roughly 15% of all conferencecontributions. For some scientific fields, e.g."Magnetism" (clearly magnetism!), "Disorderedand Frustrated Systems", "Industrial and MedicalApplications", and "Neutrons and Life Science",the BENSC partition increased up to over 20%.More than 2/3 of the BENSC contributions camefrom our external users.

New Neutron Guide Hall

The construction of the new neutron guide hall isnow under way, the foundation ceremony for thebuilding has been held on 8 December 2003,and, due to the relatively mild winter, the prog-ress in schedule. It is foreseen that the Wide-Angle Spin-Echo Instrument V5 will move fromthe old hall to the new hall. V5 will profit from thereplacement of the old neutron guide by a newballistic guide with multispectral neutron beaminjection. The replacement of the guide will startin October 2004.

Other planned - and fully financed - instrumentsin the new hall areUSANSHigh resolution SANS, equipped with a

novel focusing techniqueEXED Extreme Environment Diffractometer,

equipped with tof-momochromatisation.

The experiment site for EXED is in addition fore-seen for the project of a 25T high field magnet.And suited as well for potential projects witheven higher steady magnetic fields.

. L-L-Rainer Michaelsen

List of BE NSC Instruments

Instruments in the Experiment Hall (Thermal Neutrons)

NO.

E1

E 2

E 3

E 4

E 5

E 6

E7

E9

E10

Instrument ext.

Thermal 3-Axis Spectrometerwith Polarization Analysis 3101Flat-Cone- andPowder Diffractometer 3102Residual Stress Analysis andTexture Diffractometer 31032-Axis Diffractometer 3104(E4a: Test Device)4-Circle Diffractometer 3104

Focusing Single CrystalDiffractometer 3105Residual Stress Analysis Diffractometer(under construction) 3107Fine Resolution Powder Diffractometer(FIREPOD)

3He-Diffractometer (HELINE)

Tube

D1N

R1

T2

R2

R3

T4

D1S

T5

D1S

Instalment Staff

Hans A.GrafJens KlenkeUniv. Tbingen:

Jens-Uwe HoffmannRainer SchneiderTobias Poeste co-op. TU BerlinKarel ProkesVadim Sikolenko

Anja Loose

Jorge Hemandez-VelascoNorbert SterRainer SchneiderFlorian Henkel

Dimitri ArgyriouDaniel TbbensMichael TovarKonrad SiemensmeyerSlavomir Mat'as

March 2004

ext.

277831672185

3096323728042847

2793

2768317130963237301627932768

27573135

Room

LS 335LS 334A 239

A 132A 129LR 138LR 141

LR 129

LR 144LR 142A 132A 133LR 137LR 129LR 144LS 132LS 138

Instruments in the Cold Neutron Guide Hall

No.

V1

V 2

V 3

V 4

V 5

V 6

V 7

B8

V12a

V12b

V13V14

Instrument ext.

Membrane Diffractometer3121

3-Axis Spectrometer for Cold Neutrons(FLEX) 3122

Time-of-Flight Spectrometer(NEAT) 3123

Small Angle Scattering Instrument(SANS)

3124

Spin-Echo Spectrometer with Time ofFlight Option (SPAN) 3125Reflectometer

2806

Cold n Tomography (CONRAD)(under construction)

n-Autoradiography 3121

Double-Crystal Diffractometer(bent crystal) 3131Double-Crystal Diffractometer(lamellar crystal) 3131Fundamental Physics

Mirror Test Device

Tube

NL1A

NL1B

NL2

NL3A

NL4

NL4

NL1BU

NL1A

NL3B

NL3B

NL3B

NL1B0

Instrument Staff

Thomas Hau co-op.Univ. DsseldorfSilvia Dante TU Darmstadt

Peter VorderwischKlaus Habicht co-op. TU DarmstadtOleg SobolevMargarita RussinaJrg PieperAlexandra BuchsteinerAlbrecht WiedenmannUwe KeiderlingElvira Garcia-MatresJrg HaugAndre HeinemannCatherine PappasCarlos FehrN.N.Marita GieriingsRoland Steitz co-op. MPI-KGF GolmRumen Krastev co-op.TU Berlin

Nikolay Kardjilov

Birgit Schrder-SmeibidlLee-Ann MertensWolfgang Treimer TFH BerlinMarkus Strobl TFH BerlinTFH Berlin: Wolfgang Treimer

Ekaterina Korobkina

Thomas Krist

ext.

20712071217128073067315930733179228323393240233927692046307231412924214930772298

23372292222124902221

2290

2045

Room

LS 333LS 333A 334A 333A 331A 351A 348A 349LR 211LR 209LR 208LR 209LR 208A 346A 344LS 130A 226A 221A 223A 317

GE145V122A 319A 316A 319

V132

A 233

Sample Environment Michael MeissnerPeter SmeibidlSebastian Genscher

220430803133

LS 131LR 147LS 113

VI


V4(SANS)

? ' ,2, 3

^

(SPAN)

How to Apply for BENSC Beam Time

BENSC is open to both the national and the international user community with up to 70% of thebeam time available to external users. The main portion of this beam time is foreseen for shortterm research proposals. Applications for short term beam time will be examined by a scientificselection committee twice each year,

deadlines for submission of proposals are 15 March and 15 September.

Requests for urgent experiments (Directors's discretionary time) and for industrial use may besubmitted at any time.

Applications for BENSC beam time should be made electronically. The BENSC ONLINEPROPOSAL SUBMISSION (OPS) system is available in the internet via

http ://www.hmi.de/bensc/user-info/user-info_en. html

Further information on BENSC instrumentation can be obtained from the internet via

http ://www.hmi.de/bensc/instrumentation/instrumentation_en. html

The latest four-colour printed version of the instrumentation brochure (HMI-B 577) is on themarket since March 2001 and available on request:

BENSC-HMIOffice of the Scientific SecretaryGlienicker Str. 100D -14109 Berlin (Wannsee)GermanyPhone +49 - 30 - 8062 2304Fax: +49 - 30 - 8062 2523Email: benec9hmi.de

The BENSC Experimental Reports are intended as interim summaries. In view of the short time availablebetween the termination of certain experiments and the deadline for this report, the results presentedhere have to be considered as very preliminary. The inclusion of reports in this volume does notconstitute a publication in the usual sense. Final results will be submitted for publication in regularscientific journals.

VIM

Acknowledgement for Support by the European Commission

FP5. IHP. Access to Research Infrastructures

For most of the groups from European Community Member States and Associated States, the access toBENSC has been supported by the European Community under the

Access to Research Infrastructure Action of the Improving Human Potential Programme (IHP)

Results of IHP supported groups are contained in 66 reports of this volume.

contract number HPRI-CT-1999-00020 (IHP I) contract period 02/2000 - 01/2003 (IHP- no. 400)

IHP

145

220

318

403

413

445

446

448

448

449

452

454

462

472

473

476

482

497

498

499

501

502

503

506

508

1509

512

513

514

515

516

517

518

p.

77

1

192

18

139

197

140

158

175

37

183

134

126

181

20

67

160

207

41

90

3

60

92

193

121

167

136

168

172

79

135

42

46

authors

Deriu et al.

Idzikowski et al.

Arrighi et al.

Jensen et al.

Lo Celso et al.

Saroun et al.

Stepanek et al.

Klsgen et al.

Klsgen et al.

Marcano et al.

Barrallier et al.

Guilleaume et al.

lolin et al.

Schmidt et al.

Harrison et al.

Coldea et al.

Phoenix et al.

Vogl et al.

Hense et al.

Temst et al.

Jensen et al.

Gamari-Seale et al.

Montaigne et al.

Jobic et al.

Bourdarot et al.

Natali et al.

Calandrini et al.

Paciaroni et al.

Berti et al.

Bag lion i et al.

Triolo et al.

Gondek et al.

Tran et al.

affiliation

Univ. Parma, I

IMF PAS Poznari, PL

HWU Edinburgh, UK

Univ. Copenhagen, DK

Univ. Palermo, I

ASCR NPI Rez, CZ

IMC Prague, CZ

Univ. Odense, DK

Univ. Odense, DK

Univ. Cantabira, E

ENSAM, F

CNRS-Uni Bordeaux, F

LAS. Riga, LV

ISIS, RAL, UK

Univ. Edinburgh, UK

Univ. Oxford, UK

Univ. Centr. Lane. UK

Univ. Wien, A

TU Wien, A

KU Leuven, B

Univ. Copenhagen, DK

NCSR Demokritos, GR

LPM Nancy, F

CNRS Lyon, F

CEA Grenoble, F

OGG-INFM, Grenoble F

Univ. Parma, I

Univ. Perugia, I

Univ. Firenze, I

Univ. Firenze, I

IPCF-CNR, Messina, I

JU Krakow, PL

PAS Wroclaw, PL

IHPn

519

520

521

522

524

525

544

546

547

548

549

550

554

555

558

560

561

562

563

564

567

568

570

572

574

575

576

577

578

579

580

583

584

P-

44

112

97

70

150

69

127

91

25

24

23

198

108

48

184

87

124

123

174

169

137

132

225

49

113

2

14

43

45

236

190

152

73

authors

Wawrzynska et al.

Szymczak et al.

Borowiec et al.

Coldea et al.

Carelli et al.

Lake et al.

Gdel et al.

Temst et al.

Svoboda et al.

Vejpravova et al.

Kamarad et al.

Saroun et al.

Landa-Cnovas et al.

Campo et al.

Barrallier et al.

Farago et al.

Cahvo-Dahlborg et al.

Dahlborg et al.

Guenet et al.

Paciaroni et al.

Aliotta et al.

Triolo et al.

lolin et al.

Brck et al.

Szymczak et al.

Idzikowski et al.

Regulski et al.

Gondek et al.

Wawrzynska et al.

Tripadus et al.

Smrcok et al.

McLure et al.

Lake et al.

affiliation

JU Krakow, PL

PAS IP Warsaw, PL

PAS IP Warsaw, PL

Univ. Oxford, UK

Univ. Surrey, UK

Univ. Oxford, UK

Univ. Bern, CH

KU Leuven, B

CU Prague, CZ

CU Prague, CZ

ASCR IP Prague, CZASCR NPI Rez, CZ

ICMM-CSIC Madrid, E

Uni Zaragoza, ICMA, E

ENSAM, F

ILL Grenoble, F

CNRS Nancy, F

CNRS Nancy, F

Univ. Strasbourg, F

Univ. Perugia, I

CNR IPCF Messina, I

IPCF-CNR, Messina, I

L.A.S. Riga, LV

Univ. Amsterdam, NL

PAS IP Warsaw, PL

IMF PAS Poznart, PL

Univ. Warsaw, PL

JU Krakow, PL

JU Krakow, PL

IFIN-HH Bucharest, RO

SAS Bratislava, SK

Univ. Sheffield, UK

Univ. Oxford, UK

IX

Notice:

The quality of figures in the electronic versions, CD and WEB (http://www.hmi.de/bensc)

- especially in colour presentation - is remarkably higher than in print version

List of Contributed Experimental Reports

PAGE TITLE TEAM PROPOSAL

Magnetic Structure and Phase Transitions

1 Spin waves In amorphous andnanocrystalllne

(x = 10 or 30)

B. Idzikowski1

T. Krenicky2

J. Klenke3

S. Danilkin3

1INIF PAS Poznan, PL2EF SAV KoSice, SK3HMI Berlin

E1 PHY-02-0308

2 Neutron investigations of NI3AI itinerant B. Idzikowski1

electron system Y.-H. Hyun2

Y.V. Kudryavtsev3

J. Klenke/

1IMF PAS Poznan, PL2Univ. Hanyang, Seoul3NAS IMP Kiev, UA4HMI Berlin

E1 PHY-02-0397

3 Hc2 and magnetism in ErNijBzC A.JensenA.B. Abrahamsen2

K.N. Toft2

N.H. Andersen2

P. Smeibidl3

S. Kausche3

1Univ. Copenhagen, DK2Risoe, DK3HMI Berlin

12 Axis conversion effect in DyCu2 M. Rotter1

S. Raasch2

M. Drr2

X. Chen1

1Univ.Wien,A2TU Dresden3CU, Prague

P. Svoboda3

18 The magnetic structure of E1HI2B2C inan applied field along the c-axis

A. Jensen1

N.H. Andersen2

A.B. Abrahamsen2

K. Prokes3

S. Danilkin3

1Univ. Copenhagen, DK2Risoe, DK3HMI Berlin

E1 PHY-02-0366

4

5

6

7

8

10

11

Magnetism in RbCuCh and CsCuCh

Inelastic studies of UNiAl (2)

Phase transitions in Cu1.2sAgo.2sSe

Detailed investigation of the magneticstructures of TbCu2 on a single crystal

Magnetic order and diffuse scattering inRNI2B2C

Strong domain effects in the hexagonalferromagnet cobalt

Physical properties of magnetite Fe3O4confined In a porous glass

N. Ster1

U. Schotte1

A. Hoser2

K. Prokes

S. DanilkinJ. Klenke

A. Schneidewind1

A. Kreyig2

U. Witte2

A. Kreyssig1

O. Stocker?J.U. Hoffmann3

U. Kbler1

A. Hoser2

I. Golosovsky1

D. Kurdyukov2

1HMI Berlin2FZ Jlich/RWTH Aachen

HMI Berlin

HMI Berlin

1MPI CPfS Dresden2TU Dresden

1TU Dresden2MPI CPfS Dresden3Univ. Tbingen1RWTH Aachen2IFF, FZ-Jlich1PNPI, Gatchina, RU2PTI, St. Petersburg, RU

E1

E1

E1

E2

E2

E2

E2

PHY-02-385 +EF

EF

EF

PHY-01-1094

PHY-01-1095/01-1249

PHY-01-1251

PHY-01-1257

E2 PHY-01-1330

13

14

15

16

17

Spin-structure in Nd(i.x)PbxMnO3 singlecrystals

Reinvestigatlon of-Mn02 magneticstructure

Magnetic ordering ofY0.1 Ca0eGaxMni.xO3 (x = 0.01, 0.05)

Stability of the AF structure In UNIAInear the TN

Magnetic diffuse scattering in Nao.ToC02single crystals

U.K. Rler1

J.-U. Hoffmann2

M. Regulski1

R. Przenioslo1

W. Slawinski1

J.-U. Hoffmann2

Th. LonkaiA. PfrommerJ.-U. Hoffmann

K. Prokes

D. Argyriou1

N. Aliouane1

J.-U. Hoffmann2

1IFW Dresden2Univ. Tbingen1 Univ. Warsaw, PL2Univ. Tbingen

Univ. Tbingen

HMI Berlin

1HMI Berlin2Univ. Tbingen

E2

E2

E2

E2

E2

PHY-01-1331

PHY-01-1333

PHY-01-1402EF

EF

EF

E4 PHY-01-1125

XI

PAGE


TITLE TEAM PROPOSAL

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

Domain growth kinetics ingeometrically frustrated Isingantiferromagnet CoNb&eMagnetic structure determination andH,T phase diagram of the S=1/2 squarelattice antiferromagnet (SCAP)2CuCI4Magnetic structure of TbNis

Investigation oftheA-phase ofCeCu2Si2 in an external magnetic field

Pressure induced magnetic structuresin Lu2Fen

Magnetic phases ofNdFezSh singlecrystalMagnetic phase transitions inU(Ni,Pd)2Si2 single crystals under highpressure

Magnetic field effect on ferromagneticorder in Ndi.agCeo.isCu04

Magnetic field dependence of themartensltic transformation in Ni2MnGa

Frustrated magnetic moments inCePdAI in magnetic fieldsMagnetic structures in UlrAI

Metamagnetic transitions in DyNiAl

On the magnetic structure ofUlrGe

Crystal structure ofLa2Cu04 andLai.xSrxCuO4(x = 0.01)

Magnetic structure ofLa2CuO4

Crystal and magnetic structure ofTbVO3

Antiferromagnetic order in NdVO3

Antiferromagnetic order in LaVO3

The low temperature magnetic phasesofCeNii.xCux

Magnetic order in CeCu&h

S. Mitsuda1

Y. Inomoto1

K. Prokes2

A. Harrison1

F. Coomer1

R. Feyerherm2

A.N. Pirogov1

S. Lee2

A. Podlesnyak3

0 . Stocken1

E. Faulhaber2

H.S. Jeevan1

J. Kamarad1

0 . Prokhnenko1

K. Prokes2

J. VejpravovaJ. Prchal

P. Svoboda1

F. Honda1

J. Prchal1

K. Prokes2

M. Matsuura1

P. Dai2

K. Prokes3

D. Argyriou3

S. Shapiro1

P. Vorderwisch2

K. Prokes2

K. Prokes

K. Prokes1

J. Prchal2

K. Prokes1

J. Prchal2

K. Prokes

B. Keimer1

G. Blumberg3

Y. Ando4

M. Reehuis12

B. Keimer1

G. Blumberg3

Y. Ando4

M. Reehuis12

C. Ulrich1

B. Keimer1

M. Reehuis112

C. Ulrich1

B. Keimer1

M. Reehuis1'2

C. Ulrich1

B. Keimer1

M. Reehuis12

N. Marcano1

J.C. Gomez Sal1

J. Hernandez Velasco2

E. Faulhaber1

0 . Stockert2

1Tokyo US, JP2HMI Berlin

1Univ. Edinburgh, UK2HMI Berlin

1RAS Ekatarinburg, RU2SKKU Suwon, KP3ETHZ & PSI, CH1MPI CPfS Dresden2TU Dresden

1ASCR IP Prague, CZ2HMI Berlin

CU Prague, CZ

1CU Prague, CZ2HMI Berlin

1ORNL, USA2Univ. Tennessee, USA3HMI Berlin

1BNL Upton, US2HMI Berlin

HMI Berlin

1HMI Berlin2CU Prague, CZ1HMI Berlin2CU Prague, CZ

HMI Berlin

1MPI-FKF Stuttgart2HMI Berlin3Bell Labs, NJ4CRIEPI, Komae, Tokyo1MPI-FKF Stuttgart2HMI Berlin3Bell Labs, NJ4CRIEPI, Komae, Tokyo1MPI-FKF Stuttgart2HMI Berlin

1MPI-FKF Stuttgart2HMI Berlin


1Univ. Cantabria, E2HMI Berlin

1TU Dresden2MPI CPfS Dresden

E4

E4

E4

E4

E4

E4

E4

E4

E4

V4

E4

E4

E4/E6

E5

E5

E5

E5

E5

E6

E6

PHY-01-1128

CHE-01-1206

PHY-01-1276

PHY-01-1352

PHY-01-1353

PHY-01-1354

PHY-01-1355

PHY-01-1357

EF

EF

EF

EF

EF

PHY-01-1378

PHY-01-1378

PHY-01-1380

PHY-01-1380

EF

PHY-01-1211

PHY-01-1278

XII

PAGE


TITLE TEAM PROPOSAL

39 New nitrogen compounds G. Auffermann1

R. Kniep1

R. Niewa1

M. Kirchner1

J. Hernandez-Velasco2

N. Ster2

1MPI CPfS Dresden2HMI Berlin

E6 CHE-01-1279

40

41

42

43

On the two magnetic order parametersof yttrium iron garnet (YIG)Spin structure in HoAg

Neutron diffraction studies of magneticordering in R3Co8Sn4 (R-rare earth)compoundsNeutron diffraction studies ofnon-stoichiometric RNi(i.x)ln(i*x) compounds(R-rare earth)

U. Kbler1

A. Hoser2

K. Hense1

E. Grate1

A. Hoser2

L. Gondek1

S. Baran1


L. Gondek1

S. Baran1


1IFF, FZ-Jlich2RWTH Aachen1TU Wien, A2RWTH Aachen

1JU Krakow, PL2HMI Berlin


E6

E6

E6

E6

PHY-01-1281PHY-01-1283

PHY-01-1284

PHY-01-1368

44 Neutron diffraction study of RsCu^U (R Tb, Dy, Ho, Er) compounds

E. Wawrzynska1

J. Hernandez-Velasco'N. Ster2

B. Penc1

A. Szytula1

Z. Tomkowicz1


E6 PHY-01-1286

45

46

47

48

49

50

51

52

53

54

Neutron diffraction study ofR3Pd,Ge4(R = Tb and Er) compounds

Neutron diffraction study of poly- andsinglecrystalline UNio.sSb2 samples

The magnetic structure of theferromagnetic compound NagCozOr

Rare-earth spin canting and magneticirreversibility in NdeFe10AI4

Neutron diffraction study of a virgintransition in MnFe(P,Si) compounds

Magnetic order in CeBiPt

Phase diagram of NaxCai.xCo204with xe[0.85, 0.95]

Phase Diagram ofNaxCo02with xe [0.6,1] at room temperature

Phase separation v's quantum criticalpoint In perovskitic manganites

Complex structure of theNaxCoO2,yD2O, NaxCo02, yH2O zD2O

E. Wawrzynska1


B. Penc1

A. Szytula1

V.H. Tran1


N. Ster2

O. Leynaud1

M. Sofin1

M. Jansen1


J. Campo1

J. Luzon1

J.G. Cuello2


E. Brck1

L. Zhang1

O. MozerK. Prokes3

O. Stockert1

G. Goll2

D. ArgyriouC. MilneN. AliouaneJ. Hernandez-Velasco

D. ArgyriouC. MilneN. AliouaneJ. Hernandez-Velasco

D.N. ArgyriouC. MilneN. AliouaneJ. Hernandez-Velasco

D. ArgyriouC. MilneN. Aliouane


1PAS ILTSR Wroclaw, PL2HMI Berlin


1MRI of Aragon, E2ILL, Grenoble, F3HMI Berlin

1 Univ. Amsterdam, NL2Univ. Modena, I3HMI Berlin

1MPI CPfS Dresden2Univ. KarlsruheHMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

E6

E6

E6

E6

E6

E6

E6

E6

E6

E6/E9

PHY-01-1370

PHY-01-1287

CHE-01-1364

PHY-01-1365

MAT-01-1367

PHY-01-1478EF

EF

EF

EF

XIII

PAGE


TITLE TEAM PROPOSAL

55

56

57

58

59

In situ neutron diffraction on thedischarging process of an alkalinebattery

Magnetic structures ofR&aMOs at H=0and applied field (R=1MGd, Dy, Ho;M=Co, Ni, Cu)Influence of preparation conditions onthe magnetic structure ofMnCr2O4spinelMagnetic investigations in the spinelsystem CuxNii.xCr24

The determination of the magnetic andnuclear structure ofNarCozOe

N. KardjilovI. MankeJ. BanhartJ. Hernandez-Velasco

J. Hernandez-Velasco

D.M. Tbbens

M. Tovar1

R. Torabi12

0. Leynaud1

M. Sofin1

M. Jansen1


HMI Berlin

HMI Berlin

HMI Berlin

1HMI Berlin2TH Berlin1MPI-FKF Stuttgart2HMI Berlin

E6

E6E9

E9/E6

E6/E9

E9

EF

EF

EF

EF

CHE-01-126201-1280

60 A neutron diffraction study ofLaCoo.sMno.5f Lao.7Cao.3Coo.sMfJo.sO3 andLaaaSro.2Coo.sMno.sO3

H. Gamari-Seale1

I.O. Troyanchuk2

A. Sazonov2

K.L. Stefanopoulos1

D.M. Tbbens3

1NCSR Demokritos, GR2NAS Minsk, BY3HMI Berlin

68 Spin dynamics in the unconventionalquantum magnet NH4CuCh

Ch. Regg1

P. Vorderwisch2

P. Smeibidl2

S. Kausche2

M. Meissner2

1LNS, ETH Zrich & PSI2HMI Berlin

E9 PHY-01-1264

61

62

63

64

65

66

67

Neutron diffraction study ofLai.xSrxCoO3 magnetic structure atx- 0.15 and 0.3Neutron powder diffraction study ofEu(BaNd)2Cu3O7

Crystal and magnetic structure ofmanganese malonate

Magnetic moments of the transitionmetal ions in MnF2, FeF2 and C0F2

Two magnetically ordered phases inFe[C(CN)3h

Enhancement of the magnetic order inMg doped CuGeOe

Magnetic excitations ofquasi-1D Isingchain at high field

V.V. Sikolenko1

A. Sazonov2

V.A. Sirenko1

V.V. Eremenko1

M. Tovar2

R. FeyerhermD. M. TbbensS. LandsgesellW. Jauch1

M. Reehuis2'1

R. Feyerherm1

A. Loose1

T. Hau2'1

S. Landsgesell1

R.J. BirgeneauS. WakimotoC. Stock

R. Coldea1

D.A. Tennant2

K. Habicht43

P. Smeibidl3

1HMI Berlin2NAS Minsk, BY

1ILT Kharkov, UA2HMI Berlin

HMI Berlin

1HMI Berlin2MPI-FKF Stuttgart

1HMI Berlin2Univ. Dsseldorf

Univ. Toronto, CAN

1Univ. Oxford, UK2RAS, UK3HMI Berlin^ U Darmstadt

E9

E9

E9

E9

V1

V2/E1V2

PHY01-1268

MAT-01-1271

EF

EF

EF

PHY-02-0347

PHY-02-0352

V2 PHY-02-0374

69 Three dimensional field-inducedmagnetism in High-Tc La2.xSrxCu04

B. Lake1

K. Lefmann2

N. Christensen2

1Univ. Oxford, UK2Risoe, DK

V2 PHY-02-0379

70 Field-induced magnetization plateau ina 2D frustrated quantum magnet

R. Coldea1

D.A. Tennant2

T. Ono3

K. Habicht4'5

S. Genscher5

1Univ. Oxford, UK2RAS, UK3TIT, Tokyo, JP^ U Darmstadt5HMI Berlin

V2 PHY-02-0380

XIV

PAGE


TITLE TEAM PROPOSAL

71

72

73

74

75

7677

78

79

80

81

82

83

84

85

86

87

88

Neutron Resonance spin echo (NRSE)study of the magnon linewidth inBaMnF4

Neutron Resonance spin echo (NRSE)study of the Q- and temperaturedependence of the magnon linewidth inMnF2Searching for charge order in High-TcLa2.xSrxCu04Phonon softening preceding thereverse martensltic transformation inNhMnGa

Magnetic field effect on anti-ferromagnetic order Ndi.asCeaieCuO4

Inelastic Studies ofUNiAI(1)

Nanostructured intermetallic alloys withGMR behaviour

Pressure dependence of the magneticphase diagram in MnSi

SANS investigation of magneticnanoparticles using polarized neutrons

SANSPOL studies of hard magneticNdeoFexCo3o.xAlio(x = 20, 7.S and 0)alloysSANSPOL in multicomponent Nd-basedalloys at high temperatures

Magnetic Field induced arrangement ofconcentrated magnetosomes studiedby SANSField variation technique and Langevlnbehaviour of Co-ferrofluldsSANSPOL measurements fora newkind of Co-Ferrofluids

SANSPOL Investigations of CobaltFerrite Fluids

SANSPOL investigation of magneticpolystrene nanopartlcels

Surface dynamics of magnetism offerrofluid particles

Characterisation of the water depletionlayer at the water/hydrophobicinterface: effect surface hydrophobicity

S.P. Bayrakci1

T. Keller1

B. Keimer1

K. Habicht32

S.P. Bayrakci1

T. Keller1

B. Keimer1

K. Habicht32

B. Lake

P. Vorderwisch1

S. Shapiro2

M. Matsuura1

P. Dai2

0. Sobolev3

D. Argyriou3

K. Prokes

A. Deriu1

F. Spizzo1

A. Hoell2

L. Pintschovius1

D. Reznik2

C. Pfleiderer2

P. Baglioni1

D. Berti1

A. Wiedenmann2

0. PerroudE. Garcia-MatresA. Wiedenmann

E. Garcfa-Matres0. PerroudA. WiedenmannA. HoellA. Wiedenmann

A. HeinemannA. WiedenmannA. HeinemannA. WiedenmannM. Kammel

M. KammelA. WiedenmannA. Heinemann

M. KammelA. WiedenmannA. HeinemannB. Farago1

E. Dubois2

R. Perzynski2

M. Grunze1

M. Himmelhaus1

M. Maccarini1

R. Steitz2'34

1MPI-FKF Stuttgart2HMI Berlin3TU Darmstadt

1MPI-FKF Stuttgart2HMI Berlin3TU Darmstadt

Univ. Oxford, UK

1HMI Berlin2BNL Upton, US

1ORNL, USAzUniv. of Tennessee.USA3HMI Berlin

HMI Berlin1Univ. Parma, I2HMI Berlin

1FZ Karlsruhe2Univ. Karlsruhe

1Univ. Firenze, I2HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

1ILL Grenoble, F2CNRS, Paris, F

1Univ. Heidelberg2TU Berlin3MPI-KGF Golm4HMI Berlin

V2

V2

V2

V2

V2

V2V4

V4

V4

V4

V4

V4

V4

V4

V4

V4

V5

V6

PHY-02-0400

EF

PHY-02-0402PHY-02-0415

EF

EF

PHY-04-0595

PHY-04-0802

CHE-04-0807

EF

EF

EF

EF

EF

EF

EF

PHY-03-0301

CHE-04-0895

XV

PAGE


TITLE TEAM PROPOSAL

Magnetic Thin Films

89

90

91

Spin density waves in Cr/Ni bilayers

Polarized neutron reflectivity onexchange bias nanostructures

Polarized neutron reflectivity onexchange bias nanostructures

H. Zabel1

E. Kravtsov1

K. Prokes2

V. Sikolenko2

K. Temst1

H. Loosvelt1

0 . Popova1

H. Fritzsche2

K. Temst1

H. Loosvelt1

0 . Popova1

M. Gierlings2

1RU Bochum2HMI Berlin

1KU Leuven, B2HMI Berlin

1KU Leuven, B2HMI Berlin

E4 PHY-01-1274

V 6 PHY-04*0832

V 6 PHY-04-0897

92 Antiferromagnetic In Fe I MgO / Fetrilayer

F. Montaigne1

J. Faure-Vincent1

C. Bellouard1

M. Gierlings2

H. Fritzsche2

1LPM Nancy, F2HMI Berlin

V 6 PHY-04-0833

93 Off-specular PNR studies on a Co/CoOexchange bias multilayer

M. Gierlings1

M. Gruyters1

D. Riegel1

M. Prandolini1

H. Fritzsche1 z

1HMI Berlin2NRC Chalk River, CAN

V 6 PHY-04-0914EF

Chemical Structure

94 Search for static charge order peaks inoptimally doped YBCO

L. Pintschovius FZ Karlsruhe E1 PHY-02-0365

95 Diffuse scattering of cation-doped I. Kaiser-Bischoffzirconia-oxynitride J.U. Hoffmann2

1LMU Mnchen2Univ. Tbingen

E2 CHE-01-1250

96 Diffuse scattering of cation-dopedzirconia-oxynitride

I. Kaiser-Bischoff1

J.U. Hoffmann21LMU Mnchen2Univ. Tbingen

E2 CHE-01-1332

97 Structural and magnetic phase M.T. Borowiec1

transition of potasslum-holmium J.U. Hoffmann2

double tungstates I. Glavatski3'4

1PAS IP Warsaw, PL2Univ. Tbingen3HMI Berlin4NAS IMP Kiev, UA

E2 PHY-01-125401-1334

98 Neutron diffraction study oforientational glass state

L. S. Smirnov1

J.U. Hoffmann2

I. Glavatski3-4

1RFSSCITEP Moscow2Univ. Tbingen3HMI Berlin4NAS IMP Kiev, UA

E2 PHY-01-1256

99 Refinement of the hydrogen positionsin (NH4)2SeO4

L.S. Smirnov1

A. Loose2

N. Berntsen3

G. Melnyk3

1RFSSCITEP Moscow2HMI Berlin3JG-Univ. Mainz

E5 PHY-01-1223

100 Hydrogen positions in ND4DSO4 K. KnorrG. Lentz

CAU Kiel E5 MAT-01-1291

101 Single crystal study of the structuralinstability in deuteratedK4BEDT-TTF)2CU [N(CN)JBr

S. Siillow1

J. Kreitlow1

A. Loose2

R. Feyerherm2

1TU Braunschweig2HMI Berlin

E5 PHY-01-1376

102 Neutron diffraction study ofSrFe03s C. Ulrich1

B. Keimer1

M. Reehuis1'2


E5 PHY-01-1379

103 Superstructures in Zn2x(Culn)1.xS2 thinfilms

S. Schorr1

F. Fleischer1

N. Ster2

1Univ. Leipzig2HMI Berlin

E6 PHY-01-1282

XVI

PAGE


TITLE TEAM PROPOSAL

104 Structure and anion ordering in S. Schorr1

A. Franz1

M. Tovar2


E9 PHY-01-1263

105 Structural anomalies and cation S. Schorr1

ordering in 2ZnSe-CulnSe2 M. Tovar2


E9 PHY-01-1340

106 Structural anomalies and cation S.Schorr1

ordering in 2ZnSe-CulnSe2 N. Ster21Univ. Leipzig2HMI Berlin

E6 PHY-01-1361

107 Neutron diffraction study of FeCr2S4 R.Sadykov1

and substituted spinels N. Ster2

{(Feo.ixlnx)o.sCuodCr2S4(xBO.3;O.4) underpressure up to 20kbar

1RAS Russia2HMI Berlin

E6 PHY-01-1373

108 Cation order and magnetic structure ofruale related SbVO4

A. Landa-Cnovas1

J. Garcfa-Garcfa2

J. Hernndez-Velasco3

1ICMM-CSIC Madrid, E2Univ. Stockholm, S3HMI Berlin

E6 CHE-E9 01-1366

109 Hydration of NaxCoO2 C. MilneD. ArgyriouJ. Hernandez-Velasco

HMI Berlin E6 EF

110 Crystal and Magnetic structure of theMolecular Magnet Mn(NCS)zpyz2


N.N. Bordallo1

R. Feyerherm1

J.L. Manson2

1HMI Berlin2ANL, Argonne, USA

E6 EF

111 Phase transition in Sr, Mg dopedLaGaOe superionlc conductors

M.M. Gnter1

H. Boysen2

M. Lerch1

D. M. Tbbens3

1TU Berlin2Univ. Mnchen3HMI Berlin

E9 CHE-01-1260

112 Orbital order-disorder transitions in La- H. Szymczak1

deficient perovskite manganites M. Tovar21PAS IP Warsaw, PL'HMI Berlin

E9 PHY-01-1265

113 Neutron diffraction studies of crystaland magnetic structures of

H. Szymczak1

M. Tovar21PAS IP Warsaw, PL2HMI Berlin

E9 PHY-01-1346

114 Neutron diffraction study offerroelectric NaNO2 nanowires

A. Naberezhnov1

A. Sotnikov1

M. Tovar2

1PTI St. Petersburg, RU'HMI Berlin

E9 PHY-01-1201

115 Order parameter and structure ofnanocomposite NaNO2 embedded intoporous glass

A. Naberezhnov1

Y. Kumzerov2

M. Tovar3

1RAS loffe St. Petersburg2HMI Berlin

E9 PHY-01-1269

116 Structure and phase transition in aconfined KH1PO4

A. NaberezhnovO. Smirnov2

M. Tovar3

1RAS loffe St. Petersburg2RAS PNPI Gatchina, RU3HMI Berlin

E9 PHY-01-1348

117 New Compounds G. AuffermannR. Kniep1

B. Schupp2

C. Sekar2

G. Krabbes2

D. M. Tbbens3

nMPI CPfS Dresden2IFW Dresden3HMI Berlin

E9 CHE-01-1261

118 New nitrides and Nitridometalates G. Auffermann1

R. Kniep1

R. Niewa1

D. Zherebtsov1

Y. Prots1

1MPI CPfS Dresden2HMI Berlin

E9 CHE-01-1338

119

120

Cubic - cubic phase transition ofalumosilicate iodide sodalite

Crystal structure of Ce*Nlo.Cuo.i

D. M. Tbbens2

Th.M. Gesing1

C.H. Rscher1

J.-Ch. Buhl1

D. M. Tbbens2

N. Marcano1

J.C. Gomez Sal1

J. Hernndez-Velasco2

1Univ. Hannover2HMI Berlin

1Univ. Cantabria, E2HMI Berlin

E9 EF

E9 EF

XVII

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TITLE TEAM PROPOSAL

121

122

123

124

Study of the magnetic transition andhidden order in URu&i at 17 TeslaRotational tunneling as a probe ofadsorption sites and potentials inmethyl iodide clathrate

HBcrostructure of the molten GaPbmonotectic alloyNKcrostructure ofPdSi metallic glassesof different thickness produced underfully controlled experimental conditions

Structural Excitations

F. BourdarotB. FakM. Prager1

A. Desmedt2

A. Buchsteiner3

J. Pieper3

U. Dahlborg1

J. Haug2

M. Calvo-Dahlborg1

CM. Bao1

U. Dahlborg1

J. Haug2

CEA Grenoble, F

1FZ Julien2Univ. Bordeaux, F3HMI Berlin

1CNRS Nancy F2HMI Berlin1CNRS Nancy F2HMI Berlin

V2

V3

V4

V4

PHY-02-0375CHE-03-0256

PHY-04-0874MAT-04-0875

125 NRSE Investigation of PhononLifetimes In the conventionalSuperconductor Nb

K. Habicht31

F. Mezei1

T. Keller2

B. Keimer2

S. Bayrakci2

1HMI BENSC2MPI-FKF Stuttgart3TU Darmstadt

V2 PHY-02-0387

126 Neutron scattering by ultrasound in themosaic single crystals

E. lolin1

L. Rusevich1

F. Mezei2

J. Pieper2

A. Buchsteiner2

1L.A.S., Riga, LV2HMI Berlin

V3 PHY-03-0238

127 Ground state energy splittings in atetrahedral Coflll) complex

H.U. Gdel1

R. Bircher1

A. Sieber1

H. Weihe2

A. Buchsteiner3

1Univ. Bern, CH2Univ. Copenhagen, DK3HMI Berlin

V3 PHY-03-0267

128 Investigation of the low energyvibrational density of states inamorphous-FeojYoj ribbons

W. Keune1

B. Sahoo1

V. Kuncser2

J. Pieper3

1Univ. Duisburg-Essen2NIPM Bucharest, RO3HMI Berlin

V3 PHY-03-0287

129 Quasielastic neutron scattering ofmethyl fluoride and methyl chloride

O. Kirstein1

M. Prager2

A. Buchsteiner3

1ANSTO, AU2FZ Jlich3HMI Berlin

V3 PHY-03-0294

130 Spin echo study of the phason R A. Branddynamics in i-AICuFe quasicrystals C, Pappas2

1Univ. Duisburg2HMI Berlin

V5 PHY-03-0250

Soft Matter

131 Hydrogen-bonded structures in F. Aliottamethanol/CCU mixtures D. M. Tbbens2

1IPCF Messina,2HMI Berlin

E9 PHY-01-1344

132 Local structure in atactic polypropyleneacross the glass transition

A. Triolo1

D. M. Tbbens2

O. Russina2

1IPCF-CNR, Messina, I2HMI Berlin

E9 PHY-01-1345

133 Intriguing structural behaviour of themodel system L-alanine

N. Bordallo1

D.N. Argyriou1

M. Barthes2

1HMI Berlin2Univ. Montepellier II, F

E9 EF

134 Molecular dynamics in the F. Guillaume1

incommensurate 2-decanone/urea A. Desmedt1

crystal R. Lechner2

1CNRS - Univ. Bordeaux, F2HMI Berlin

V3 CHE-03-0234

135 Segmental dynamics of confined PEO A. Triolo1

O Russina2

J. Pieper2

1CNR IPCF Messina, I2HMI Berlin

V3 PHY-03-0262

XVIII

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TITLE TEAM PROPOSAL

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

Dynamic features ofhydration waterinteracting with Hydrophobie molecules

Incoherent quasi elastic neutronscattering in methanol/CCI4 mixtures

Dynamics of the CH3.and NHe-groups inL-alanine

Structural investigation onphosphollpidlc-cyclodextrin derivatives

Nanostructured ternary polymersystems

Dynamics of 4-n-4'-octyl-cyanobiphenilby neutron spin echoTemperature dependence ofpoly(etylene oxide) brushes

Internal order of polyelectrolytemultilayers

The osmotically swollen phase ofpolyelectrolyte brushesIs there an odd/even effect of the watercontent of polyelectrolyte multilayers?

Polyelectrolyte multilayers: hydrationand odd-and-even effects

Thermodynamic stability ofpolyelectrolyte multilayers

Chemical switching of protein-surfaceInteractions with weak polyelectrolytebrushes

Vapour sorption in min self-assembledAu-nanoparticle/dendrimer compositefilms

Polymer interfaces near the criticalpointStudy of the geometry of lipid coupledto polyelectrolyte multilayers

Spontaneous temperature-recycledwetting at solid/liquid interfaces innear-critical liquid/liquid mixturesmediated by wall coating

V. Calandrini1

A. Deriu1

G. Onori2

R. Lechner3

J. Pieper3

F. Aliotta1

C. Vasi1

F. Saija1

A. Buchsteiner2

H.N. Bordallo1

C. Fehr1

S. Rols2

M. Bathed2

F. Lo Celso1

R. Triolo1

U. Keiderling2

P. Stepanek1

P. Cernoch1

D. Clemens2

A. Wiedenmann2

C. FehrC. Pappas

C. HelmA. WesemannH. AhrensC. HelmM. GopinadhanH. Ahrens

CA. HelmH. AhrensR. v. Klitzing1

W. Wong1

S. Schemmel1

R. Steitz1'2'3

M. Schnhoff1

D. Carriere1

R. Krastev1'2'3

C. Delajon1

I. Estrela-Lopis1

E. Donath1

G. Ibarz2

R. Krastev23-4

M. Tanaka1

F. Rehfeldt1

R. Steitz2'3'4

T. Vossmeyer1

R. Krastev2'3'4

N. Krasteva1

C. Carelli1

M. Sferrazza2

C. Delajon1'2

R. Krastev2'3'4

I.A. McLure1

M.C. Vergara-Gutierrez1

R. Stertz"'4

1Univ. Parma, I2Univ. Perugia, I3HMI Berlin

1CNR IPCF Messina, I2HMI Berlin

1HMI Berlin2Univ. Montepellier II, F

1Univ. Palermo, I2HMI Berlin

1IMC Prague, CZ2HMI Berlin

HMI Berlin

Univ. Greifswald

Univ. Greifswald

Univ. Greifswald

1TU Berlin2MPI-KGF Golm3HMI Berlin

1MPI-KGF Golm2TU Berlin3HMI Berlin

1Univ. Leipzig2MPI-KGF Golm^ U Berlin4HMI Berlin1TU Mnchen2TU Berlin3MPI-KGF Golm4HMI Berlin1Sony Stuttgart2MPI-KGF Golm3TU Berlin4HMI Berlin1Univ. Surrey, UK2Univ. Brussels, B1Uni+ISIS Strasbourg, F2MPI-KGF Golm3TU Berlin4HMI Berlin1Univ Sheffield, UK2TU Berlin3MPI-KGF Golm4HMI Berlin

V3

V3

V3

V4

V4

V5

V6

V6

V6

V6

V6

V6

V6

V6

V6

V6

V6

PHY-03-0264

PHY-03-0289

EF

CHE-04-0689

CHE-04*0748

EF

MAT-04-0662

PHY-04-0893

PHY-04-0894PHY-04-0822

PHY-04-0826

PHY-04-0829

PHY-04-0830

MAT-04-0831

PHY-04-0836CHE-04-0859LT

CHE-04-0900

XIX

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TITLE TEAM PROPOSAL

153 Lipid bilayer formation on hydrophilic R. Krastev1'2'3

substrate in presence sucrose Th. Gutberlet41MPI-KGF Golm2TU Berlin3HMI Berlin4PSI Villigen, CH

V6 CHE-04-0908LT

154 Vapour sorption in thin self-assembled R. Krastev123

AU-nanoparticle/hexadecanedithiol N. Krasteva4

composite films T. Vossmeyer4

1MPI-KGF Golm2TU Berlin2HMI Berlin4Sony Stuttgart

V6 CHE-04-0909LT

155 Depletion of water at the hydrophilicsolid/liquid interface

R. Steitz123

G.H. Findenegg1

S. Schemmel

TU Berlin2MPI-KGF Golm3HMI Berlin

V6 CHE-04-0910LT

156 Depletion of methanol at theHydrophobie solid/liquid interface

R. Steitz123

G.H. Findenegg1

S. Schemmel

TU Berlin2MPI-KGF Golm3HMI Berlin

V6 CHE-04-0911LT

157 Surfactant layers at the Si/liquidinterface as a function of time andtemperature

R. Steitz12'3

G.H. Findenegg1

S. Schemmel

1TU Berlin2MPI-KGF Golm3HMI Berlin

V6 CHE-04-0912LT

Biology

158

160

Stability of lipid bilayers uponinteraction with membrane activemolecules

Neutron diffraction studies on themembrane interactions of m-calpain,domain V

B. Klsgen1

M. Dathe2

T. Hau4'3

S. Dante5

D.A. Phoenix1

S. Dennison1

F. Harris1

S. Dante2

T. Hau34

Univ. Odense, DK2FI Mol. Pharm. Berlin3HMI Berlin4Univ. DsseldorfT U Darmstadt1Univ. Centr. Lane. UK2TU Darmstadt3Univ. Dsseldorf4HMI Berlin

V1

V1

PHY-01-1229

BIO-01-1233

161 Peptide-membrane interaction R. WillumeitM. KumpugdeeS. LinserF. Frster

GKSS Geesthacht V1 BIO-01-129401-1384

163 Interactions of lipids with peptideantibiotics

F. Bringezu1

A. Gabke1

M. Majerowicz1

T. Hau23

S. Dante4

1Univ. Leipzig2Univ. Dsseldorf3HMI Berlin*TU Darmstadt

V1 BIO-01-1295

164 Localizing the quinone domain ofubiquinone in the oxidized and reducedstate

ThS.T.N.

. Haines1

Dante2

Hau34

Dencher2

1 City Coll. of CUNY, USA2TU Darmstadt3Univ. Dsseldorf4HMI Berlin

V1 BIO-01-1296

165 Investigation of model stratum corneumlipid via neutron diffraction

M. Kiselev1'2

J. Zbytovska1

S. Wartewig1

R. NeuberfS. Dante3

T. Hau4'5

1MLU Halle2JINR Dubna, RU^TU Darmstadt4Univ. Dsseldorf5HMI Berlin

V1 BIO01-1387

166 Interaction of -amyloid peptide (1-42)with lipid unilamellar vesicles

S. Dante1

T. Hau2'3

N. Dencher

1TU Darmstadt2Univ. Dsseldorf3HMI Berlin

V1 BIO-01-1427

167 Transfection efficiency versusmembrane dynamics in DNA-cationiclipoplex

F. Natali1

C. Castellano2

J. Pieper3

A. Buchsteiner3

1OGG-INFM, Grenoble, F2Univ. Roma, I3HMI Berlin

V3 BIO-03-0258

XX

PAGE


TITLE TEAM PROPOSAL

168 Effect of the environment on thelysozyme dynamics. A quaslelasticneutron scattering study (1)

A. Paciaroni1

A. de Francesco1

L.E. Bove2

M. Marconi1

1Univ. Perugia, I2OGG-INFM, Grenoble, F

V3 BIO-03-0265

169 Effect of the environment on thelysozyme dynamics. A quasielasticneutron scattering study (2)

A. PaciaroniA. de Francesco1

L.E. Bove2

J. Pieper3

1Univ. Perugia, I2OGG-INFM, Grenoble, F3HMI Berlin

V3 BIO-03-0291

170 Dynamics of hydration water in modelmembranes systems

A. Buchsteiner1

J. Pieper1

A. Lerf2

1HMI Berlin2Walther-Meissner-lnst.,Garching

V3 BIO-03-306EF

171 Protein flexibility in photosystem II ofgreen plants

J. Pieper1

R. Lechner1

T. Hau2'1

M.We3

G. Renger3

1HMI Berlin2Univ. Dsseldorf3TU Berlin

V3 EF

172 Molecular recognition ofphosphottponucleosides in direct andreverse micelles

D. Berti1

F. Baldelli Bombelli1

M. Bonini1

A. Brand2

1Univ. Firenze, I2HMI Berlin

V4 BIO-04-0808

173 What makes elastase specific? A. Zychlinsky1

M. IngersollH.N. Bordallo2

T. Hau32

'MPI-IB Berlin2HMI Berlin3Univ. Dsseldorf

V4 BIO-04-0868

174 Large-scale chain conformation in J.-M. Guenet1

stereoregularpolyelectrolyte/protein V. Ball1

complexes U. Keiderling2

1Univ. Strasbourg, F'HMI Berlin

V4 CHE-04-0872

175 The wetting behaviour of hydrophobicpolymer layers

B. Klsgen1

R. Krastev3'24

R. Steitz2'3'4

1Univ. Odense, DK2TU Berlin3MPI-KGF Golm4HMI Berlin

V6 PHY-04-078404-0892

176 Preparation of polymer supportedcharged lipid layers for adsorptionstudy ofA(25-35)

S. Dante1

Th. Hau25

R. Steitz3'4'5

1TU Darmstadt2Univ. Dsseldorf3TU Berlin4MPI-KGF Golm

V6 BIO-04-0850

aHMI Berlin177 Adsorption of globular proteins on a

planar polyelectrolyte brushC. Czeslik1

G. Jackler1

R. Steitz2'3'4

Univ. Dortmund2TU Berlin3MPI-KGF Golm4HMI Berlin

V6 CHE-04-0889

178 Biocomposite planar polyelectrolyte S. Gromelski1

multilayers as a tool to understand R. Krastev1'23

different DNA transport systems


V6 BIO-04-0890

179 Adsorption of amyloid beta (1-40) S. Rocha1

peptide on hydrophobic polymer R. Krastevcovered solid surfaces G. Brezesinski1

,1,2,3


V6 CHE-04-0907LT

180 Adsorption of amyloid beta (1-40) S. Rocha1 1MPI-KGFGolm V6 EF-LTpeptide at hydrophilic polymer R. Krastev123 2TU Berlincovered solid surface G. Brezesinski1 3HMI Berlin

Material Science and Industrial Applications

181 In situ study of non-stoichiometrlcSrFeOx under different oxygen partialpressures

M. Schmidt1

S.J. Campbell2

M. Hofmann3

1ISIS, RAL, UK2Univ. NSW, AU3TU Mnchen

E2 MAT-01-1181

182 Phase transformation in 7U modulated N. Glavatska1

structure in non-stoichiometric Ni-Mn- I. Glavatski12

Ga martenslte J.U.Hoffmann3

1NAS IMP Kiev, UA2HMI Berlin3Univ. Tbingen

E2 MAT-01-1335

XXI

PAGE


TITLE TEAM PROPOSAL

183

184

Neutron determination of residualstress In a nhrided notched part

Neutron evaluation of residual stress inindustrial screws

L. BarrallierA. FabreA. GerbelJ. Jeanjean

L. BarrallierA. FabreJ.-E. Masse

ENSAM, F

ENSAM, F

E3

E3

MAT-01-1243

MAT-01-1393

185 Residual stresses in cylinders, -comparison of neutron and X-raydiffraction measurements -continuation for a 20MnCrB casehardenable steel

T. Hirsch1

S. Rocha1

T. Poeste2'3

1Univ. Bremen, IWT2HMI Berlin^"U Berlin

E3 MAT-01-1299

F. Henkel2

R. Schneider2

186 Investigation of the residual stressprofile along the radius of a highlyloaded turbine wheel

R. HessertT. Poeste23

H. Freydank2

R. Schneider2

1MTU Aero Space2HMI Berlin' Berlin

E3 EF

187 Development of the stress profile closeto the Inner surface of an impellerduring the production process

R. Bschen1

T. Poeste2'3

H. Freydank3

R. Schneider3

1MTU Friedrichshafen2TU Berlin3HMI Berlin

E3 EF

188

189

Analysis of residual stresses inAISi7Mg/-SiC/70p MMCs by neutrondiffraction

Misfit measurements on Ni-basesuperalloys

U. Gbel1

H.P. Degischer2

R. Schneider3

T. Poeste3'4

F. Henkel3

P. Lemke3

R. Gilles1

M. Hlzel1'2

D. Mukherji3

D. del Genovese3

P. Strunz4

1 Siemens AG Mnchen2TU Wien3HMI Berlin^ U Berlin

1TU Mnchen2TU Darmstadt3IWF TU Braunschweig4PSI Villigen, CH5HMI Berlin

E7 MAT-01-1240

E9 MAT-01-1341

D. M. Tbbens0

190 Quantitative phase analysis of Portland L Smrcok1

clinkers and the products of their O. Pritula1

chemical decomposition P. M. Tbbens2

1SAS Bratislava, SK2HMI Berlin

E9 MAT-01-1347

191 Neutron diffraction studies of the V. Efimov1

relaxor PLZT 8/85/35 irradiated by high- S. Tyutyunnikov1

current pulsed electron beam V. Sikolenko2

1JINR Dubna, RU2HMI Berlin

E9 PHY-01-1349

192 Chain-end effects on local dynamics inlong chain alkanes

V. Arrighi1

F. Saggio1

H. Qian1

A. Desmedt2

1HWU Edinburgh, UK'HMI Berlin

V3 CHE-03-0204

193 Diffusion of linear alkanes in NaX H. Jobic1

zeolite A. Buchsteiner21CNRS Lyon, F2HMI Berlin

V3 CHE-03-0260

194 Dynamic coupling of cation diffusion D. Wilmer1

and anion reorientation in solid H. Feldmann1

solutions of sodium orthophosphate A. Buchsteiner2

and sodium sulfats

1Univ. Mnster2HMI Berlin

V3 MAT-03-0286

195 Changes in fprecipitate morphology in G.Schumacher1 1HMI Berlin V4 MAT-single crystal superalloy SC16 during P. Strunz2 2PSI Villigen, CH 04-0741thermal treatment

196 Sintering process in LaiZriOi and G. Schumacher1

SrZrO3 ceramics thermal barrier P. Strunz2

coatings R. Vassen3

1HMI Berlin2PSI Villigen, CH3FZ Julien

V4 MAT-04-0796

197 Investigation of cavities mlcrostructurein Y-TZP ceramics using SANS

J. SarounV. Ryukhtin1

S. Harjo2

Y. Motohashi2

A. Wiedenmann3

1ASCR NPI Rez, CZ2lbaraki Univ., JP3HMI Berlin

V4 MAT-04-0750

XXII

PAGE


TITLE TEAM PROPOSAL

198 Characterisation of precipitatesinduced by irradiation in reactor vesselsteels

J. Saroun1

0. Muransky1

J. Kocik1

E. Garcia-Matres2

A. Heinemann2

1NPI Rez, CZ2HMI Berlin

V4 MAT-04-0869

199 Polarised SANS investigations of blockcopolyslloxane-complexed cobaltnanoparcles

T. St. Pierre1

L. Harris1

E. Gilbert2

A. Hoell3

1Phy. Dept, UWA, AU2Bragg Institute, AU3HMI Berlin

V4 PHY-04-0761

200 Investigation of the microstructure offerrofluids using small angle neutronscattering

S. OdenbachL PopJ. HilljegerdesA. Muslimayne

Univ. Bremen V4 MAT-04-0798

201 SANS investigations on RPVsteel after A. Ulbricht7

reirradlatlon A. Heinemann21FZ Rossendorf2HMI Berlin

V4 MAT-04-0799

202 Hard magnetic properties of bulkamorphous NdeoFe2oCoioAlio

H. HermannE. Garcia-Matres2

A. Wiedenmann2

1IFW Dresden2HMI Berlin

V4 MAT-04-0800

G. Kumar

203

204

205

206

207

Insitu characterization of precipitationsequence in a modified 706-type Ni-Fesuperalloy

Microstructural evolution ofnanocrystalline Mania during sinteringSANS investigation of precipitationhardening In AA 8016 alloyImpact of ultrasonic agitation ondispersions ofultraflne silica powders,analyzed with time-resolved SANS

Diffusion studies in Intermetallicphases with NSE. L11 structures

J. Eckert1

D. Mukherji1

P. Strunz2

D. del Genovese3

R. Gilles4

M. Winterer1

U. Keiderling2

J. Haug

H. Hahn1

H. Sieger1

U. Keiderling2

A. Wiedenmann2

G. Vogl1

M. Rennhofer1

C. Pappas2

C. Fehr2

1ETH Zrich, CH2PSI Villigen, CH3TU Braunschweig*TU Mnchen1Univ. Duisburg-Essen2HMI BerlinHMI Berlin

1TU Darmstadt2HMI Berlin

1Univ.Wien,A2HMI Berlin

V4

V4

V4

V4

V5

MAT-04-0865

MAT-04-0882EF

EF

PHY-03-0251

208 High flux neutron tomographyinvestigation of a Lil battery

J. Banhart1

I. Manke1

A. Hilger1

N. Kardjilov1

M. Dierik2

B. Masschaele2

1HMI Berlin2Univ. Gent, B

V7 EF

209

210

211

212

Real-time imaging with cold neutrons

SANS investigation of plasticallydeformed stainless steel

Porosity study in Ag-Cu alloyspecimens

Porosity study In Ag-Cu alloyspecimens

N. Kardjilov1

A. Hilger1

M. Dierik2

B. Masschaele2

V.T. Lebedev1

G. Trk2

A. ManescuF. SpinozziF. Fiori

A. ManescuF. SpinozziF. Fiori

1HMI Berlin2Univ. Gent, B

1RAS PNPI Gatchina, RU2RU KFKI Budapest, H

Univ. Ancona, I

Univ. Ancona, I

V7

V12a

V12a

V12a

EF

MAT-04-0819

MAT-04-0820

MAT-04-0820cont.

XXIII

PAGE


TITLE TEAM PROPOSAL

Development of Instruments and Methods

213

214

215

216

217

218

219

The influence of an organic phase onthe efficiency of a ceramic neutronimage plate

Diamagnetic signal from Bi singlecrystal (polarization option at E4)

Neutron transmission through apackage of Al and 10B slitsTesting the use of sapphire sampleholders in high-temperature powderdiffractionThe new "BerSANS-PC" dataprocessing softwareInstrumental resolution on V4 afterchanging the detector readout systemDetector efficiency map and dead timecorrection on V4 after changing thedetector readout system

J. Zimmermann1

R. Kolb1

J. Klenke2

S. Danilkin2

K. ProkesV. SikolenkoF. Mezei

J. PetersN. SterD. M. Tbbens

U. Keiderling

A. WiedenmannJ. HaugA. WiedenmannJ. Haug

1TU Darmstadt2HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

HMI Berlin

E1

E4

E6

E9

V4

V4

V4

OTH-02-0384EF

EF

EF

EF

EF

EF

EF

220 Mew front-end electronics and dataacquisition system for SANS detector

Th. Wilpert1

W. Altmann1

J. Haug1

R. Schneider1

G. Montermann2

1HMI Berlin2mesytec gbr, Putzbrunn

V4 EF

221 Larmor precession tomography F. MezeiC. PappasR. Schneider

HMI Berlin V5 EF

222 Neutron spin-echo angle coding R. Pynn1

M. Fitzsimmons1

H. Fritzsche2

J. Major3

1LANL, USA2NRC Chalk River, CA3MPI MF Stuttgart

V6 MAT-04-0854/04-0905

223 Small angle scattering from D2O-treatedanodizedAI wire and ribbon

K. Habicht12

T. Keller34

M. Strobl5

1TU Darmstadt2HMI Berlin3MPI-FKF Stuttgart4FRM II Garching5TFH Berlin

V12 EF

224 USANS studies of artificial lattice M.Strobl,W. Treimer

TFH Berlin V12 EF

225 Inelastic neutron scattering byultrasound - research by bonse hartdiffractometer

E. lolin1

L. Rusevich1

M. Strobl2

W. Treimer2

P. Mikula3

1IPE, Riga2TFH Berlin3NPI, Rez, Prague

PHY-V12 04-0884

a

226 First three dimensional refractioncontrast tomography

M. Strobl2'W. Treimer2

A. Hilger1'2

1HMI Berlin2TFH Berlin

EFV12

a227 Refraction contrast tomographies of

different shaped samplesM. StrobrW. Treimer2

A. Hilger.1,2


EFV12

a228 Refraction contrast tomographic

imagingW. Treimer2

M. Strobl2

A. Hilger1'2

C. Seifert2


EFV12

a

229 Refraction contrast tomographies insimple Bonse-Hart DCD set-up

M. Strobl2

W. Treimer2

A. Hilger1'2


EFV12

b

XXIV

PAGE


TITLE TEAM PROPOSAL

230 Test of two Si-wafer based collimators M. StrobrW. Treimer2

T. Krist1

M. Seurig2


EF

V12b

231 Spatial resolved USANS measurements M. Strobl1

A. ManescuTFH Berlin2HMI Berlin

EF

V12b

232 Investigation of a focusing parabolicguide by a radiography method

P. Bni1

N. Kardjilov2

A. Hilger23

M. Strobl3

W. Treimer3

1TU Mnchen2HMI Berlin3TFH Berlin

EFV12

b

233 Development of neutron opticalelements

Fundamental Physics and Others

234

235

236

Translational diffusion of Hz in singlewalled carbon nanotubes

Study of the diffusion of molecularhydrogen In nanoporous materials

Molecular dynamics in tryclyinesulphate (TGS)

T. Krist1

J. Hoffmann2

P. Sokol1

D. Narehood1

J. Pieper2

R. Lechner2

P. Sokol1

Y. Glanville1

J. Pieper2

R. Lechner2

V. Tripadus1

J. Pieper2

A. Buchsteiner2

A. Serban1

1HMI Berlin2Univ. Tbingen

Venn State Univ., USA2HMI Berlin

1Penn State Univ.. USA2HMI Berlin

1IFIN-HH Bucharest, RO2HMI Berlin

V14

V3

V3

V3

EF

PHY-03-0269

PHY-03-0297

PHY-03-0293

237 Search for scission neutrons usingangular correlations in fission of U-23S

G.V. DanilyanV.S. Pavlov1

I. Karpikhin1

V. Krakhotin1

A.V. Fedorov1

B. Golub2

E. Korobkina2

D.Fink1

M.Mller1

M.Behar2

M.F.Soarez2

P. Alegaonkar3

1RF SSC ITEP Moscow2HMI Berlin

1HMI Berlin2UFRGS Porto Alegre,

BrazilUniv. Pune, India

V13 PHY-05-005

B7 EF238 Redistribution of ion-implanted eLi*inpolystyrene

239 Autoradlographs from the painting"Armlda abducts the sleeping Rlnaldo(-1037)" by Nicolas Poussin120x150 cm2

C. Laurenze-Landsberg1

C. Schmidt1

L.A. Mertens2

B. Schrder-Smeibidl2

1 Gemldegalerie Berlin(GMB)

2HMI Berlin

B8

240 Autoradiographs from the painting"Valley with Diane and her nymphs "by C. SchmidtJan Tilens (1589-1830),89x156 cm2

C. Laurenze-Landsberg1

LA. Mertens'B. Schrder-Smeibidl2

Gemldegalerie Berlin(GMB)

2HM! Berlin

B8

XXV

PHY-02-0308.doc // brandt // 03.03.04 Seite 1 von 1

EXPERIMENTAL REPORT Proposal N PHY-02-308Instrument E1Spin waves in amorphous and nanocrystalline Fe73.5-

xNixSi13.5Cu1Nb3B9 (x=10 or 30) Local Contact J. Klenke

Principal Proposer: B. Idzikowski, IFM PAN Pozna, Poland Date(s) of ExperimentExperimental Team: T. Krenicky, EF SAV Koice, Slovakia

J. Klenke, HMI, Berlin, GermanyS. Danilkin, HMI, Berlin, Germany

29.1.200310.2.2003

Date of Report: 30.12.2003

Iron based alloys of FINEMET-type are of particularinterest due to their superior magnetic properties(e.g. extremely low coercivity). This nanocrystallinesoft magnetic material can be produced by stoppingthe onset of crystallization of certain amorphousalloys.

The mean field theory does not explain correctlythe local magnetic excitations in amorphousmagnetic materials, which are characterized by theabsence of long-range topological order. A possibleway to determine the value of the spin wavestiffness constant D which follows from the spinwave theory is a detailed analyses of thetemperature behavior of the magnetization in thesematerials [1] but more complex information could beprovided by inelastic neutron scattering experiment.

The amorphous ribbons Fe73.5-xNixSi13.5Cu1Nb3B9 (x=10 or 30) were prepared bysingle-roller technique. Typical dimensions of theribbons are 25 mm of thickness and 10 mm ofwidth. The temperature dependence of magneticbehavior of the samples shows Fig. 1.

0 200 400 600 8000.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

mag

netiz

atio

n [a

. u.]

temperature [C]

Fe63.5Ni10Si13.5Cu1Nb3B9 Fe43.5Ni30Si13.5Cu1Nb3B9

Fig. 1. Magnetization-versus-temperature forFe73.5-xNixSi13.5Cu1Nb3B9 (x=10 or 30)

Amorphous precursors was annealed in vacuumat 400C and 500C for 1 hour in order to produceset of amorphous (as-quenched), relaxedamorphous and nanocrystalline (with small amountof crystalline phase) samples, respectively.

The inelastic neutron scattering spectra weretaken on the E1 triple-axis spectrometer at Hahn-Meitner-Institut Berlin (BENSC) with 40-10-10-10collimation. The q-constant method was used for

searching magnon excitations at temperaturesbetween 105 and 500 K (see Fig.2).

-0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.830

40

50

60

70

80

90

100

q=0.075T = 300 K

Fe43.5Ni30Si13.5Cu1Nb3B9 as-quenched

coun

ts

energy transferFig. 2. Gaussian fits of measured spectrum for

Fe43.5-xNi30Si13.5Cu1Nb3B9 ribbon

For a Heisenberg feromagnet with only nearest-neighbor interactions, the spin-wave dispersion atsmall q is given by q = Dq2. The calculated val-ues of spin wave stiffness constants for the as-quenched Fe63.5Ni10Si13.5Cu1Nb3B9 ribbons atq = 0.075 are listed in upper part of Table 1. Addi-tionally, we observed wide-spreading of the mainpeak with temperature of the sample annealing (lastrow in Table 1).

TABLE 1. The stiffness constants D forFe43.5Ni30Si13.5Cu1Nb3B9 ribbons obtained from the slopeof the dispersion relation curves and mean peak width

D[meV2]Measurement tem-perature [K] as-

quenchedannealed at

400Cannealed at

500C200 113 120 -300 102 110 -400 - 89 109

Energy rangeMean peak width 0.88 0.95 1

In conclusion, partially crystallization of samplesprovide an open area for investigation of the spinwave stiffness constant values in these materials.

References:[1] B. Idzikowski, A. Wrzeciono, J. Kovac; IEEE Trans. Magn.

30 (1997) 561[2] G. Shirane, S.M. Shapiro, J.M. Tranquada: Neutron Scatter-

ing with a Triple-Axis Spectrometer, Cambridge UniversityPress, 2002

1


EXPERIMENTAL REPORT Proposal N PHY-02-397Instrument E1Neutron investigations of Ni3Al itinerant

electron system Local Contact J. Klenke

Principal Proposer: Bogdan Idzikowski, IMF PAS Pozna, Poland Date(s) of ExperimentExperimental Team: Young-Hoon Hyun, Hanyang Univ., Seoul, Korea

Yuri V. Kudryavtsev, Nat. Acad. Sci. Ukraine, KievJens Klenke, HMI, Berlin, Germany

28.10.2003 12.11.2003


Ni3Al alloy is a typical weakly-itinerant ferromagnetin which spin fluctuations play an important role.Such ferromagnets are characterized by the exis-tence of the ferromagnetically-ordered regions farabove TC. We have investigated by neutron diffrac-tion magnetic behavior of stoichiometric and off-stoichiometric single crystal and polycrystallinealloys below and above transition temperatures.

It is known that for stoichiometric -phase Ni3Alsingle crystal no high-temperature transition wasobserved. But there is a crossover from spin fluc-tuator to ferromagnet at some small deviations ofthe Ni concentrations in this alloy.

In our investigated alloys Ni0.752Al0.248 andNi0.771Al0.229 the spin fluctuation is unlikely the ex-planation of the existence of the high-temperaturetransition Tm, as well as the low-temperature one TC(see Fig. 1). Thus, the high-temperature kink canbe caused by the transition into a true paramag-netic state. The existence of magnetic inhomoge-neity in the alloy confirmed by the AC magneticsusceptibility measurements in which the suscepti-bility curve exhibits two magnetic transitions, one at87.5 K and the other at 252 K play a key role for thephysical properties.

0 50 100 150 200 250 3000.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

Tm

Tc

Ni0.77Al0.23

m = 0.08930 ggamma = 8 g/cm3

frequency = 133 HzAC field = 1 Oe

AC s

usce

ptib

ility

[arb

. uni

ts]

Temperature [K]

Fig. 1. Temperature dependence of magneticsusceptibility for NiAl sample.

Three different models explain the existence oftwo transitions temperatures for the off-stoichiometric alloy : (i) Stoner-Edwards-Wohlfarth[1] (ii) the selfconsistent renormalization of the spin-fluctuation [2], and (iii) a modified self-consistentrenormalization of the spin-fluctuation modelutilizing the Ginzburg-Landau formalism [3]. Therewere evidences for the well-defined spin-waveexcitations, obtained by small-angle neutron-scattering [4] and inelastic neutron scattering [5]experiments. However, the influence of magnetic

fields on magnetic behavior can be attributed to anenhancement of the effective electronic mass dueto the spin fluctuations.

38.0 38.5 39.0 39.5 40.0 40.5 41.0

300

600

300

600

250

500

250

500

250

500

Tc > Tm = 10 K

2 degrees

Tc = Tm = 50 K

Tc < Tm = 85 K

Cou

nts/

MO

N50

000

Tc < Tm = 10O K

Tc

EXPERIMENTAL REPORT

Hc2 and magnetism in ErNi2B2C

Proposal N PHY-02-366

Instrument E1

Local Contact

J. Klenke

Date(s) of Experiment

1. 4. - 9. 4. 2003

Principal Proposer: Anette Jensen, University of Copenhagen

Experimental Team: A.B. Abrahamsen, K.N. Toft and N.H. Andersen,Ris National LaboratoryP. Smeibidl and S. Kausche, Hahn-Meitner Institut

Date of Report19. 12. 2003

Magnetism and superconductivity coexist inseveral of the borocarbides RNi2B2C (R = Dy,Ho, Er, Tm) and the interaction between the twostates is often observed as features in the uppercritical field Bc2 due to ordering of the rare earthmoments. We have examined the magnetic or-dering of the R = Er compound and mapped outa set of transitions between spin density waveswith different commensurate wave vectors whena magnetic field is applied along the crystallo-graphic [010] direction of the tetragonal I4/mmmunit cell. The transitions are found to be in-dependent of the upper critical field Bc2 of thesuperconducting state.

Experiment and Results

The critical temperature of the superconductingstate in R = Er is Tc = 11 K and the Er mo-ments order into a transverse spin density wavebelow the Neel temperature TN = 6.8 K in zeroapplied field. Two equally populated magneticdomains are observed and the wave vector isQA = (0.55, 0, 0) or QB = (0, 0.55, 0) with thepolarization along the [010] or [100] direction re-spectively.

Transitions in the majority domain with or-dering vector QA are found when the appliedfield is increased along the [010] direction andthe domain is suppressed at B = 2.2 T andT = 1.8 K as shown on figure 1. The zero fieldstructure with QA = 0.55 rlu is first replaced byQA = 0.572 rlu at B = 0.7 T. The wave vec-tor then reaches the maximum QA = 0.59 rlu atB = 1.1 T, decreases back to QA = 0.58 rlu andfinally stabilizes at QA = 0.572 rlu at B = 1.7 T.The minority domain QB with the moments per-pendicular to the applied field shows no changein wave vector and is suppressed at B = 1.3 T.

The transitions are caused by the locking of

the spin density wave to commensurate struc-tures, which has been explained by a mean fieldmodel[1]. Thus the QA = 0.572 rlu structurehas been suggested to consist of 7 ferromag-netic planes, which are coupled antiferromagnet-ically in the configuration (). The prin-ciple Fourier component of the structure will beQ = 4

7= 0.571 rlu. Similar but more compli-

cated spin-slip structures have been justified bythe mean field model and are indicated by hor-izontal lines in figure 1. A puzzling observationis the lack of hysteresis in the intensity of theminority domain as the applied field is rampeddown. This might be connected to creation offlux lines at the upper critical field Bc2 1.5 T.

0 0.5 1 1.5 2

0.55

0.56

0.57

0.58

0.59

B [T]

Q [r.l.u]

11/2016/29

5/9

4/7

11/1918/3114/24

10/17

16/27

0 0.5 1 1.5 20

0.5

1

1.5

2

2.5

3

3.5

4

4.5Int. intensity [arb. units]

B [T]

B||(010)

T = 1.8 K

Figure 1: Properties of the majority domainQA = (Q, 0, 0) (squares) and minority domain QB =(0, Q, 0) (circles) when the field is applied along the[010] direction. Closed and open symbols representthe field history ramping up and down respectively.Left : Ordering wave vector variation of QA and QB.Right: Integrated intensity variation of QA and QBdomain. The total intensity is shown by the solidline. The non-uniform intensity variation is due toextinction.

[1] J. Jensen, Phys. Rev. B 65, 140514, 2002

3

PHY-02-0385_ EF.doc // brandt // 09.03.04 Seite 1 von 1

EXPERIMENTAL REPORT Proposal N EF*Instrument E1*Magnetism in RbCuCl3 and CsCuCl3Local Contact *

Principal Proposer: N. Ster, U. Schotte, HMI Berlin Date(s) of ExperimentExperimental Team: N.Ster, A.Hoser FZ Jlich/RWTH Aachen *26.5.-4.6.03

12.11.-16.11.0328.11.-2.12.03

Date of Report: 6.12.03*

RbCuCl3 is a frustrated antiferromagnet of theABX3 family. The ordering temperature isabout 19 K and the saturation field amounts to66 Tesla at low temperatures. Similar to ourstudies of CsCuCl3 we wanted to investigatethe field dependence of the magnetic structure.

Our experiments were performed with the E1-spectrometer in a diffracting mode and wehave used the magnet VM1b to apply fields upto 14.5 Tesla. Single crystals were provided byH. Tanaka. The linear dimensions of thecrystals used were in the order of 10 mm.At zero field RbCuCl3 has a magneticpropagation vector of about (0.297 0.297 0) i.e.the moments order ferromagnetically along cwhile the moments are arranged in a helixwithin the ab-plane [1]. First we havemeasured the magnetic satellite reflection as afunction of temperature at zero field and at13.5 Tesla. Fitting a power law behaviourwithin a reduced temperature regiont = (TN-T)/TN 10-1 we obtained a criticalexponent with a value of 0.237(4) and0.265(8) for H = 0 Tesla and H = 13.5 Tesla.The first value of is slightly larger than thereported 0.200(9) in [1]. From our measurements we find a shift in thepropagation vector by 1.5% with temperature(fig. 1). This behaviour is different to thetemperature independence of the propagationobserved for CsCuCl3.In a next step we looked to the field behaviourof the magnetic structure. The field wasapplied parallel and perpendicular to thec-axis. Scans were along (h h 0). Thesemeasurements were performed attemperatures around 2 K and at temperaturesjust below TN. Up to 14 Tesla no additionalsatellite reflections (higher harmonics) couldbe found which would indicate a significantdistortion of the regular spiral. Also the positionin reciprocal space of the satellite was notinfluenced by the field. Only a slight decreasein the peak intensities could be observed.Since the saturation field at low temperatures

is quite large with about 66 Tesla our appliedfields up to 14 Tesla were not sufficient toaffect the magnetic structure significantly.Therefore our field limitation to 14 Tesla doesnot allow to study the change in the magneticstructure even at temperatures close to TN byneutron diffraction.

Fig.1 : temperature behaviour of magneticsatellite measured at zero field.

Beside RbCuCl3 we have further studiedCsCuCl3 and performed a Fourier analysis ofthe field distorted spiral. A typical result of ouranalysis is shown fig.2 showing that orderedmoments are elongated along field directions.In addition spins rotate towards field and spinsin opposite direction spread apart. fig.2:

magnetic spiral of CsCuCl3 in a field of 11.5 Tesla.

[1] M. Reehuis et.at. J. Phys. And Chem. of Solids62 (2001) 1139-1143

1 1 .5 T

0 2 4 6 8 10 12 14 16 18 20

0,292

0,294

0,296

magnetic satellite reflection RbCuCl3

(h h

0)

temperature [K]

4

EF_01_Prokes.doc // brandt // 03.03.04

EXPERIMENTAL REPORT Proposal N EFInstrument E1

Inelastic Studies of UNiAl (2) Local Contact J. Klenke

Principal Proposer: K.Prokes, HMI Berlin Date(s) of ExperimentExperimental Team: K.Prokes, HMI Berlin

26.6.2003-6.7.2003


UNiAl forms in the hexagonal ZrNiAltype of structure and orders anti-ferromagnetically (AF) below TN = 19.3 K [1].History-dependent phenomena exist in UNiAl.Two antiferromagnetic steructures arecompeting. The microscopic differencebetween the zero-field AF structure with qold =(0.1 0.1 0.5) and the new one with qnew =(0.173 0 0.5) is that the sine-wave modulationof U moments (in both cases the amplitudeamounts to 1.3 B, moments are directed alongthe c axis and the sample consists from three kdomains) is along the [110] in the former and[100] in the latter case [2]. From V2experiment we have realized that no welldefined magnetic excitations exist in UNiAl.

The crystal (the same as in the case ofV2 study) was placed in the 14.5 T cryomagnetVM1 and investigated on E1 with ratherrelaxed colimation 80'-40'-40' to increaseintensity on account of resolution.

In Fig. 1 we show the contour plots ofthe temperature dependencies of thequasielastic response function measured at thetwo characteristic reflections (old left) atvarious magnetic fields. As can be seen, the oldAF structure remains stable in the wholetemperature range in fields up to ~ 8T. Abovethis field, the new AF structure starts tocompete with the old one and above 11 T itbecomes stable. Note the appearance of the"new" reflection at ~7K upon the field of 11 T(about 4 K lower than the "old" reflectionappears) and gradual disappearance of the"old" reflection at lower temperatures. Thispoints to a slow relaxation phenomena - due tothermal activation. Fact that the old reflectionappears at higher temperature that the new onepoints to existence of second magnetic phasetransition. Interestingly, field of 11 Tcorresponds well with the field above whichthe magnetic phase transition is of the first

orTarenex

R[1MC[231

5

Old 0T

T (K)5 10 15 20 25 30 35

E (m

eV)

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.00 200 400 600 800 1000

New 0T

5 10 15 20 25 30 35-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.00 200 400 600 800 1000

T (K)

E (m

eV)

Old 8T

5 10 15 20 25 30 35

E (m

eV)

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.00 200 400 600 800 1000

New 8T

T (K)5 10 15 20 25 30 35

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.00 200 400 600 800 1000

E (m

eV)

T (K)

Old 11T

T (K)5 10 15 20 25 30 35

E (m

eV)

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.00 200 400 600 800 1000

New 11T

T (K)5 10 15 20 25 30 35

E (m

eV)

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.00 200 400 600 800 1000

Fig. 1: Quasielastic signal measured at the old andnew magnetic reflections at various applied fields(top-zf, middle-8T, bottom-11T) upon cooling. Notesignificant signal around TN (which decreases withfield) and appearance of signal at lower temperaturesin fields above 8T at the new reflection (right).Seite 1 von 1

der type [1]. A significant intensity aroundN suggests that both AF structures competeound TN. This can also explain moderatelyhanced specific heat of UNiAl. See also V2perimental report.

eferences] V. Sechovsky and L. Havela: in Handbook ofagnetic Materials, ed. K.H.J. Buschow, vol. 11,h.1 ]K. Proke, et al. Physica B: Condensed Matter,2-313, (2002), 872

EF_02_Danilkin.doc // brandt // 03.03.04 Seite 1 von 1

EXPERIMENTAL REPORT Proposal N EFInstrument E1Phase transitions in Cu1.25Ag0.25Se Local Contact

Principal Proposer: S. Danilkin Date(s) of ExperimentExperimental Team: S. Danilkin, HMI, SF2

J. Klenke, HMI, SF2 10.07. 11.07.200325.08. 29.08.2003.


The temperature of superionic transition inCuxSe depends on composition. It equals to414 K in Cu2Se and lies below room T forcompounds with Cu content x = 1.75 1.85.High - T superionic -phase has an f.c.c.structure with disordered distribution of Cucations. The ordered low - T -phase has acomplicated noncubic structure.

1 2 3 4

0

200

400

600

Inte

nsity

, arb

. uni

ts

Q, A-1

Fig. 1. Diffraction patterns of - Cu1.98Se at RT.Upper curve double crystal scan.Lower curve triple-axis mode, E 0 scan.

Diffraction study of polycrystalline samplesCu2Se [1] reveal the presence of strong diffusescattering, which was attributed to structuraldisorder and correlation between thermaldisplacements of atoms. The relativecontribution of these two parts in diffusebackground could be measured using triple-axis spectrometer in conventional diffractionmode and with analyser crystal fixed to E 0.

In the present experiment we studied thediffuse scattering in polycrystalline samplesCu1.75Se and Cu1.98Se. The cylindrical samples(8.5 and 4.8 g in weight) were prepared bysolid-state reaction of high purity Cu and Sepowders at 720 K. Measurements have beendone with spectrometer E1 at = 2.419 withcollimation 40-40-40-80.

The diffraction patterns of - and - Cu1.98Se are shown in Fig. 1 and 2. Spectrameasured with and without analyser crystal

were normalised to have the same area ofelastic Bragg peaks.

In addition to strong elastic Braggreflections spectra of -Cu1.98Se at RT (Fig. 1)show the presence a number of small coherentpeaks which form the irregular backgroundwith maximum intensity around Q = 3 -1.Different behaviour was observed for the samecompound in -phase (Fig. 2). The smallpeaks smooth out and the strong diffuseinelastic scattering is seen only in the spectrameasured in double crystal mode.

1 2 3 4

0

200

400

Inte

nsity

, arb

. uni

ts

Q, A-1

Fig. 2. Diffraction pattern of - Cu1.98Se at 450 K.Upper curve double crystal scan.Lower curve triple-axis mode, E 0 scan.

This result contradicts with data from Ref. 1which do not show notable difference betweenspectra measured in double crystal and E 0modes of experiment. Probably this is due to anarrower elastic window in our experiment,which cuts off the low-energy excitations. Ourresult shows that diffuse scattering insuperionic phase arises mainly fromcorrelations among the thermal displacementsof the ions. Note that measured diffractionpattern of - Cu1.75Se is very similar to that ofCu1.98Se at 450 K (Fig. 2).

References:

1. Sakuma T, Aoyama T., Takahashi H. ShimotoY. Morii Y., Physica B, 213-214 (1995) 399.

6


EXPERIMENTAL REPORT Proposal N PHY-01-1094Instrument E2Detailed investigation of the magnetic

structures of TbCu2 on a single crystal. Local Contact J.-U. Hoffmann

Principal Proposer: Astrid Schneidewind, MPI-CPfS Dresden Date(s) of ExperimentExperimental Team: Astrid Schneidewind, MPI-CPfS Dresden

Andreas Kreyssig, TU Dresden, IAPDUlrike Witte, TU Dresden, IAPD

30.01.-03.02.2002


The magnetic structure of TbCu2 is assumed to becollinear with magnetic moments along the a-directionof the orthorhombic crystal [J. Phys. Soc. Japan 47(1979) 67]. The magnetic unit cell is 3a x b x ccompared to the lattice parameters a, b, c. Thepropagation vector is found to be = (1/3 0 0). At aboutT = 42 K a phase transition commensurate incommensurate is expected with increasingtemperature (Nel temperature TN = 55 K). The magneticbehaviour of TbCu2 was new investigated in the contextof the studies on Tb0.5Dy0.5Cu2 by different methods.Some results of these investigations do not fully agreewith the known magnetic structure. To ascertain how farthe unexplained results are connected with changes ofthe magnetic structure dependent on temperature theneutron scattering experiment on a single crystal wasperformed at E2/BENSC.

Fig.1: Intensities measured in the reciprocal (h0l)-planeat T = 1.6 K.

The experiment was performed with = 0.239 nm usingadditional filters to suppress higher harmonics of . Thescans were taken by rotating the sample and detecting180 of the reciprocal ac- or ab-plane at T = 1.6, 5, 20,42 and 61 K. Reflections belonging to the expectedmagnetic structure have to be found at positions =G (1/3 0 0) and 3 =G (1 0 0) when G is a reciprocallattice vector. For moments directed parallel to amagnetic intensities are forbidden at the (h 0 0)-positions. Fig. 1 shows as an example that magneticintensities belonging to , 2 and 3 were observed at(h 0 0) positions as well as at (h 0 l0) positions in thereciprocal ac-plane. The same result is found in thereciprocal ab-plane. Contamination of 2 and 3 areexcepted by the experiment. Scans around selectedreflections according to the first, second and thirdharmonics of the fundamental wave vector of themagnetic structure were performed depending on thetemperature, using different steps, especially attemperatures 1.6K T 5K.

The results of the experiment show:

The additional phase transition observed bymagnetization measurements at T = 2.3 K is notconnected with changes in the magnetic orcrystalline structure.

It has to be accepted that there exists a component ofthe magnetic moment perpendicular to thecrystalline a-direction. In addition, the reflectionsbelonging to 2 do not agree with the knownmagnetic structure of TbCu2. Thus the magneticstructure described by Hashimoto et al. [J. Phys.Soc. Japan 47 (1979) 67] has to be extended bysome details.

There is no indication for an incommensuratemagnetic structure in TbCu2. The postions ofreflections belonging to do not change withtemperature within the experimental error. Thephase transition at about T = 42 K is connected withthe vanishing of the reflections according to higherharmonics, i. e. the character of the magneticstructure changes from a squared up structure to asinusoidal structure.

7

PHY-01-1095+1249.doc // Kreyssig // 16.03.04 Seite 1 von 2

EXPERIMENTAL REPORT Proposal N PHY-01-1095 PHY-01-1249Instrument E2Magnetic order and diffuse scattering in

RNi2B2C Local ContactJens-Uwe Hoffmann

Principal Proposer: Andreas Kreyssig Date(s) of ExperimentExperimental T

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BENSC EXPERIMENTAL REPORTS 2003