PROCEEDINGS OF THE

NUCLEAR PHYSICS AND SOLID STATE PHYSICS SYMPOSIUM

PUNE, DECEMBER 26-30, 1977

VOLUME 20C

SOLID STATE PHYSICS

UNIVERSTAT33IBUOTHEKHANDOVER

TECHNISCHE

INFORMA7 iONSSlBLIOTHEK

ORGANISED BY THE

DEPARTMENT OF ATOMIC ENERGY

GOVERNMENT OF INDIA

CONTENTS

I. LOW TEMPERATURE BEHAVIOUR OF SOLIDS AND

LIQUIDS

Orbital Precession in Superfluid He-A : P. Bhattacharyya 1

Coherence Factors in Excitonlc Insulators : R. E, Amrltkar

and N. Kumar 4

Coupling of the Martensitic Transformation with the Super¬

conducting Transition : B. K, Chakrabarti, B. P. Barua and

S.K. Sinha > 7

Effect of Transverse dC Injection on the I-V Characteristici

of Superconducting Microbridges : G. Dharmadurai and

B. A, Ratnam 11

II. ELECTRONICS PROPERTIES OF SOLIDS

Positron Angular Correlation Studies in Iron-Nickel

Alloys : T. Nagarajan, A. Narayanasamy, S..Ramasamyand V. Manohar 15

Cluster Model Studies of LiCl In Water s A. Seth,E.J. Baerends and T. Paakkari

4

18

Temperature Dependence of Positron Annihilation in

Vanadium Hydrides : S. MantI and R. M. Singru 21

Electron Momentum Distribution and Compton Profiles in

Vanadiums K.R.K. Gandhi and R. M. Singru 23

Two-dimensional Positron Angular Correlation Curves in

Copper : R. M. Singru and P. E. Mijnarends

Theoretical Compton Profiles in Vanadium and Palladium

Hydrides : K. R.K. Gandhi, R. M. Singru and D. G. Kanhere

Temperature-Dependent Electronic Contribution to Shock

Hugoniot Equation of State of Aluminium : B.K. Godwal,

S.K. Sikka and R. Chidambaram

26

29

Positron Annihilation Calculation for High 2 Metals Using

RAPW Functions : K. lyakutti and V. Devanathan 32

33

-i-

-11 ~

L&tiice Parameter and Electrical Relativity of

Uranium Cat-tide to 120 KBAR : Rita Kapoor,

/, Saukara Saotry and K. Govinda Rajan

On Certain Functional Analytical Aspects of Band-

Edg» States j R. Subramanian and K. V. Bhagwat

Effect of Correlation on the Band-Structure of

Magnesium : R. Asokamani, R, S. Rao, K. Iyakuttiand V. Devanathatt

ATA and the Complex Energy Bands of Binary Alloys s

N, C. Debnath and S. Chatterjee

An Ablnltlo Study of Plasma Oscillations in free ElectrGas : R. K. Kher and M, G. Bhide

Donor Energy States in GaP ; M. Robert Singh andS. Balasubramanian

On the Polaraalc Stata s T. K, Mitra

Dynamical Correlations in a Classical One ComponentPlasma ;*H. B, Singh, Aruna Sharma and K. N. Pathak

Frequency Dependence of the Local Field Factor of an

Electron Liquid i B.K. Rao, S.8, Mandal and D. N.Tripafehy

Electron-Electron Umklapy Scattering Processes inSodium j O.'N, Awasthi and S. Sail eh

Bound State of Two Collective Excitations in an

Electron Gas s D. N, Tripathy and P. Deo

Plasmon Dispersion in H Metal for Large WaveVectors : R.K. Pal and D, N. Tripathy

New Trends in ESCA Shifts : M. N. Ghatikar andB. D, Padalia

Metal Non-Metal Transition in Oxides of TransitionMetals - A Theoretical Study : M. L. Kalra and

U, N. Upadhyaya

-iii-

Paa

The Impurity Dependent Intrinsic Resistivity of Indium :

S. M. Sharma 75

79

Stopping Power of Solids for Energetic Ions in Planar

Channeling : Anand P. Pathak

Low Temperature Electrical Resistivity of Potassium, s

N. C. Mohapatra and P. K. Misra83

Evaluation of Overlap Integrals in SjC : Manikarnika Lagu 87

Electronic Energy States of Films and Surfaces :

M. Nandi and S. Chatterjee go

Determination of Colloidal Size by Positron AngularCorrelation : T. Nagarajaa, S. Ramasamy,.Y. V. G. S. Murti and N. Sucheta 89

Effect of Pressure on the Electrical Resistance of the

Charge Transfer Complex Benzidine-DDQ : A. V. Nalini,

S, Chatterjee, S. V. Subramanyam and S. N. Vaidya 90

Electrical Resistivity due to Dislocation only :

Debadideb Bhattacharya aad A. S. Ghosh 94

Recovery in Neutron Irradiated Tungsten '. M. Sf Anand,

a. M. Pande and R. P. Agarwala 98

Electrical Conductivity Measurements in Ammonium

Sulphate : N. Hariharan and Georgina Mary Rani 101

Comparative I-V Studies on Thin Films of Copper Oxide,

Ferric Oxide and Copper Ferrite : S. A. Patll, A. U. Patil,

A. Y. Khot, R.N. Patll and B. G. Brahmecha 102

Electrical Conductivity and Microhardnesa of Single

Crystals of Potassium Chloride : J. R. Pandya and R. T. Shah 104

Decay and Recovery of Internal Voltage in MIM Sandwich

Structures Using Organic Molecular Films as Dielectric • 105

A.K. Kapil and V.K. Srivastava

Dielectric Constant Measurement of Copper Ferrite Thick

Films at Microwave Frequency : A. U. Patll, S. R. Sawant,

J. I. PawarandR. N. Patil 106

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Temperature Dependence of Dielectric Loss in OrganicMolecular Films : A. K. KapiL S. K. Gupta and

V„K. Srivastava 108

Electrical Conductivity and Dielectric Properties, of Some

Cobalt-Zinc and Barium Ferrites : V. R. K. Murthy and

J, Sobhanadri 10q

Current-Voltage Characteristics of Lead Zirconate~

Lead Titanate SolidlSolutions : C. P. De, P. S. Prasad

and Ramji La 210

Variation of Surface Space Charge Layer and

Potential with Temperature in Silver Bromide Crystals :

Mahendra Singh and O. P. Khandelwai 111

Sensitization of Selenium Photoreceptors by PhthalocyantnePigments : P. C. Meaendru, S„ Radbakrishnan and

N. L. Pathak UZ

Avalanche Breakdown in Ferroelectric BaT10_ and KNbO

Single Crystals : V. G. Kher, K. R. Bagree and

D. A. Deshpande 113

Photodielectric Effect (PDE) in Pbl, Single Crystal :

P.K. C. Pillai, R.G. Mendiratta, C. K. Pillai and

R. Nath 117

Annealing Behaviour and Hall Effect in Thin LayeredCu-Sn Films : K. Narayandas, M. Radhakrishnan and

C. Balasubramanian 121

Conductivity of Thin Bismuth Films at Microwave

Frequency ; S. A, Gangal and R. N. Karekar 124

Field Dependence of Resistance and Grain Size Variation

with Substrate Temperature in Discontinuous Sn Films :

M. S. Jagadeesh and Damodara V, Das*

27

Preparation of Alloys Cu. Se2 Sn and Study of Their

Electrical Conductivities : ueetha Subramanian and

S. Srinlvasan 130

The Klfect of Temperature an Evaporated Stearic Acid Film

Capacitors : R. KasUingam, C. Balasubramanian and

M. Radhakrishnan - 133

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Page

Distribution of Dipoles in VC : VAc Copolymer Films :

N. P. Gupta, Kamlesh Jain and P. C. Mehendru 136

Charge Transport Mechanism in Polyvinyl Fluoride Films :

P. C. Mehendru, N. L. Pathak and Suresh Chand 139

Electronic Conduction in Eosin Doped Polyvinyl Alcohol :

P. C. Mehendru, N. L. Pathak and S. Radhakrishnan 142

Electrical Properties of Poiyferrocene Films :

Shireesh D, Phadke, R. N. Karekar and

K. Sathianandan 146

Thermally Stimulated Current Studies in DopedPolystyrene t P. K. C. Pillai and Rashmi 150

Adiabatic Hall-Effect : B. S.'V. Gopalam 153

Temperature Dependence of the Extra-Ordinary Hall

Constant of Copper Ferrite Thin Films : S, R, Sawant,A. U, Patil, S.A, Patil, A. Y. Knot and R. N. Patil 157

Electrical Transitions in CuSO,. 5H O Single Crystals ;

D.A. Deshpande, P.N. Nandi and VTG. Kher 159

Space-Charge Limited Currents in Ferric Oxide : D. K. Jain

and J, C. Garg 161

Electrocaloric Effect in Ferroelectric KNbO, SingleCrystal: A. G. Katpatal and K. G. Deshmukh 162

Electrical Properties of Ferroelectric-Glass Compositions :

A. G. Katpatal and L. J'. Raibagkar 164

Green's Function Theory of Ferroelectric Phase Transitions

in Hydrogen-Bonded System : S. Ganguli and B. K. Chaudhuri 165

On the Ideality Factor of a Schottky Contact :

A.N. Daw, A.K. Datta and S. B. Roy 168

Temperature Dependent Oxide Charge in MOS Structures

with. ULtrathin Oxide : Vikram Kumar and Walter E. Dahlke 171

Barrier Lowering in Metal -N+(Thln)-N Diode in InP :

G. S. Visweswaran, R. Sharan and C. N. Krishnan 174

-VI-

£ass

A Study of Interface States in MOS Structure by Field

Effect, C-V andl-V Characteristics Measurements :

J, Majhi and M, S. Jagadeesh 177

Energetic Ion Backscattering and I-V Characteristics

of Schottky Barrier Contacts on InSb : A. Agrawal, 180

A. K„ Majumdar and R. Sharan

Photocapacitance Studies In Metal Oxide Semiconductor

Structures s M„ Mohan Chandra and G. Suryaa 183

Behavirol Characteristics of Glassy As-Ge-Te and Se-

Ge-Te Alloy-Systems : A, Kumar, O. S. Panwar, .D. R. Goyal,K.N. Lakshminarayan and K. K. Srivastava .187

Photo-Voltaic Spectrum of Polycrystaliine Silicon

Schottky Barrier Diode : P. Caleb Dhanasekaran

and B. S. V„ Gopalam 190

Effect of Thermal Annealing in Hydrogen Atmosphereon the Interface States of Gallium Arsenide and,"ttsNative Oxide :fi,M, Arora and A. M, Narsale 193

A Study of Photo Dielectric Effect in Tin Doped Gallium

Arsenide at High Frequencies : V. K. Farkya and

N. L. Porwa) 196

Pseudopotential Theory and the Impurity States in Ge :

E„ Palaniyandi and S. Balasubramanian,

197

Ton Implantation in Amorphous Germanium and Silicon :

P. Sekhar, M. C. Joshi, S. Guha and K. L. Narasimhan 1.98

Studies of Silicon Implanted with High Doses of NitrogenIons : A. D. Yadav and M. C. Joshi 200

Electron Irradiation in Amorphous Silicon s R. S. Deshmukh,

S. Guha and K. L. Narasimhan 203

Electron-Transport Through Neutron-Irradiated

In-CdS-In Structure : P,C. Srivastaya 206

Effect of Electrodes on Thin Films of CdS : A„ K. Tewari,

M. Datta and D. L. Bhattacharya 209

Electrical Conductivity, Thermoelectric Power, Optical

Absorption ^nd Structure of Thin Ge and GaSb Films :

B. S. Naidu,1 S. Mohan and P. Jayarama Reddy 212

Electrical Conductivity and Optical Absorption Studies in

InAs and InTe Thin Films : A. K. Sharma, D. V. K. Sastryand P. Jayarama Reddy 215

-vii-

Effect of Anisotropic Energy Surfaces and the SpatialDispersion of Dielectric on the Hubbard Model :

P. L. Geetha and S. Balasubramanian 218

Semiempirical CNDO Methods and the Binding Energy of

Group (III-V) and (II-VI) Compounds : K. S. Kulkami,J. S, Murthy and C. R. Sarma 221

Pressure Gradients of Energy Gaps of DegenerateSemiconductors • D. K. Roy and R. Y. Thakur 225

Behaviour of Mixed P- and N-Semiconducting Oxides :

R. K. Ponde, H. V. Keer and A. B. Biswas 229

Positron Life-Time Measurements in Gallium Arsenide

Single Crystals : K. P. Gopinathan, C. S. Sundar,V. Swaminathan and B. Viswanathan 232

Surface Structures of Semiconductors ': John Ridgway 236

Field Enhancement of Photoemission in an Alkali

Antimonide Photocathode : C. Ghosh and B. P. Varma 240

III. DYNAMICAL AND THERMAL PROPERTIES OF

SOLIDS AND LIQUIDS

Rotational Dynamics of Ammonium Ions in Octahedral

Surroundings : B. A. Dasannacharya, P. S. Goyal,S. K. Sinha and C. L. Thaper 243

Rotational Form Factor of NH4I : B. A. Dasannacharya

and-P. S. Goyal 247

Coexisting Phases in NH^I : P. S. Goyal and

B. A. Dasannacharya 250

Ultrasonic Attenuation and Velocity in Transformation

Products of Steel : G. Chengalrayan and

V. Padma Nabha Sarma 253

Lattice Dynamics of oC -Potassium Nitrate :

S. L. Chaplot, K. R, Rao, A.H. Venkatesh and

P. R, Vijayaraghavan 257

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Page

Infrared Study of Optical Phonons in

CsMnCl,. 2H O Crystal j Bhagwan Siagh, Y. S. Jain

and B.N. KnWa 262

Neutron Inelastic Scattering from Glycine and

Dl- 0^ -Alanine : C. L. Thaper, S. K. Sinha and

B. A. Dasannacharya 266

An Irreversible Structural Phase Transformation in

Nickel Sulphate Hexahydrate s A, K. Upadhyaya and

H. D. Bist 269

Effects of the Nonlocality and Depletion Hole in the

Lattice Dynamics of d-Barid Metals ; J, Kumar and

J. C. Upadhyaya 270

Normal Modes of Oscillations of Lattices with

Arbitrary Boundary Conditions : R.N. Chaudhurl and

R. K. Kar 274

Phonon Dispersion in Rare Gas Solids Derived from a

New Many Body Potential : S. Lehri and M. P. Verma Z77

A Model Approach to a Consistant Calculation of

Lattice Dynamics of Alkali Metals s D, Sen,S. K. Sarkar and D. Roy 280

Three-Body Interaction and Lattice Dynamics of

Metals : S.K. Das, S. K. Sarkar and D. Roy 284

The Expression for Lundqvist Three-Body Interaction

in Shell Model s S.K. Sarkar and S. Sengupta 287

Coherent Potential Approximation for a Diatomic

Linear Chain having Mass and Force Constant Changes :

P. Nayak and S.N. Behera 290

Temperature Dependence of Specific Heat and OrdeB

Parameter of p-n Heptyloxy Benzylidene-p-Amino-benzoic Acid : C, Manohar, V. K. Kelkar and

J. V. Yakhmi 293

Lattice Thermal Conductivity of Lithium Fluoride at

Low Temperatures : V. Radhakrishnan and

P. C. Sharma, 296

-IX-

Temperature Variation of Thermal Expansion of

KF by X-ray Diffraction and Energy of Vacancy-

Pair Formation ; N. M. Pandya and N. P. Shah 299

Evaluation of the Third Order Elastic Constants and

the Pressure Derivatives of the Second Order Elastic

Constants of T1C1 and TIBr : V.K. Garg, D. S. Puri

and M, P. Verms 301

Third-Order Elastic Constants of Gold : B. P. Barua and

S. K. Sinha 304

Lattice Theory of the Elastic Dielectric and Its

Application to Centro Symmetric Cubic Structuased

Solids : S. C. Goyal, O. P. Sharma, Vinod Kumar

and Jai Shanker 305

Temperature Dependence of Absorption Peak in Ionic

Crystals: M. R. Monga, V.K. Jindal and K. N. Pathak 306

Mean Square Displacement of an Atom in an Anharmonic

Crystal : V.K. Jindal, M. R. Monga and K. N. Pathak :("

Lattice Relaxations near a Vacancy in Copper :

S.K. Sen and M. B. Dutt ,ra

A Modified Force Constant Approach : S.K. Sarkar

and S. Sengupta 311

Space Group Change Accompanying Order - Disorder

Transition in (NH4), CuCl4> 2^0 : M. L. Bansal,

V. C. Sahni and A. P. Roy 312

Polar Mode Softening and Elastic Anomaly Temperatures

of Partially Deuterated KDP : G. K. Roy and

B.K. Chakrabarti3I6

Far-Infrared Transmission in Pb-Ge-S Amorphous

Semiconductors ; K. L. Bhatia and S. C. Katyal 320

On Woodcock Potential : K.P. Thakur and B.N. Jha 323

Pressure Dependence of the Critical Coexistence Curve

in Three Binary Liquid Mixture : A. Sivaraman,

A.K. Bandyopadyay, V. C. Padaki and E. S. R. Gopal 327

-X-

Detection of the Gravity Effect cm Critical Binary

Liquid Systems : Anil Kumar, M. K, Tiwari,S„ Jyothi and E. S. R. Gopal 330

Frequency Dependence of Critical Resistivity in BinaryLiquids ; Anil Kumar and E. S. R, Gopal 333

A New Statistical Mechanics s G. Suryan 336

Thermal Variation of Specific Heat of Chromium

Potassium Akmi in the Temperature Range 77 to 300K :

S.S. Mitra, &v"k. Ghorai and S. K. Dutta Roy 340

Temperature Dependence of the Density, Volume'ExpansionCoefficient and Tilt Angle of HxBPA for 250 K«CT^.340K :

K. Usha Deniz, A, I. Mehta, U. R. K. Rao,P. S. Farvathanaihaa and A. S, Paranjpe 344

Electron-Phonon Interaction in Doubly Doped Germanium

at Low Temperatures : Surendra Sindh and G. S, Verma 347

Thermal Expansioa of CoSi F^6H20 near its Phase

Transition Temperature : A. N. Das, N. Chatterjee,B. Ghosh and S. Nath 348

Scattering of Long Wave Phonons by Dislocations in

Plastically Deformed Germanium : S. Singh and K, C, Sood 349

Semiconductor-to-Metal Transition in Pure and V-DopadTi Oj : A, M. Shaikh, M. A. Vis-wamitra and C. N. R. Rao 352

Quantum Mechanical Formulation of Phonon Attenuation

in N-Type Semiconductors -with ZB Structure :

Mahiradhwaj Singh 356

Electron-Phonon Interaction in N~Type HI-V Semiconductor :

Mahiradhwaj Singh 359

Phases and Phase Transitions in the Compound p-n-

Alkoxybenzylidene-p-Aminobenzoic Acids :

K. Usha Deniz, A. S. Paranjpe, P. S. Parvathanathan,

E. B, Mirza, A.I. Mehta and K. S. Patel 362

~xi-

Refractive Indices and Orientational Order of Nematic

N-(4-Hexyloxybenzylidene)-p-Toluldine :

R. Somashekar and D. Krishnamurti 366

Electron Microscope Observation of Damage in Heavy

Ion Irradiated Silicon : L. E. Thailamanl and M. C. Joshi 369

Blistering by Helium Ion Bombardment s D.K. Sood,

M. Sundararaman and R. Krishnan 373

Empirical Rules for Substitutionality in Metastable

Surface Alloys Produced by Ion Implantation : D.K. Sood 376

Structure Investigation of Different Varieties of Indian

Silk by X-Ray Diffraction : N. V. Bhat and G. S. Nadiger 380

Infrared and X-Ray Diffraction Studies of Preswollen

Polymers : Nylon 6 : L. P. Singh and N. K. Chaudhuri 384

Small-Angle X-ray Investigation of Macromolecular

Deformation of Cellulose-I in Sisal Fiber : A. Patel 387

Collective Motions in Liquid Aluminium : G. S. Dubey,

D. K. Chaturvedi and K. N. Pathak 390

Backflow Effect in Classical Systems, IIOne-Component

Plasma : G. S. Dubey, P. K. Kahol and D. K. Chaturvedi 393

Backflow Effect in Classical Systems I. Liquid Rubidium :

P.K. Kahol, D.K. Chaturvedi andK. N. Pathak 396

Rotational Correlation in Cyclohexane by Raman Scattering :

M. L. Bansal and A. P. Roy 399

Radial Distribution Function of Pure Borate Glass :

B. Jayaswal and S. C. Sen 403

Orthoboric Acid : An Unsisual Ferroelastic : V. K. Wadhawan 404

Surface Segregation in Allays t Vijay Kumar, Deepak Kumar

and S.K. Joshi408

Localisation of Electrons in Disordered Systems :

A. Mookerjee and V. Choudhry 411

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Pagg

tY- MAGNETIC PROPERTIES OF SOLIDS

Coercive Force and Perpendicular Anisotropy of

Electro-Deposited Nickel Films : V. Jayaraman and

S.K. Dutta Roy 415

Susceptibility Critical Point Exponents for Some Mixed

Garnets: C. Srinivasan, Om Prakash and R. Aiyer 418

Effect of External Electric Field on Anomalous

Mossbauer Llneshapes ; R, Nagarajan and J.K. Srivastava 421

Low Temperature Susceptibilities of BIS (Dithlocarbamates)Iron Chloride : S. N. Bhatia and R. L. Carlin 424

Super-Exchange Interaction In Spinel Ferrimagnetics :

C. M. Srivastava, N. G. Nanadikar and G. Srinivasan 427

Magnetic Properties of Rare-Earth Ions in a Tetragonal

Crystalline Field of Zircon Structure Systems : Vlnod Kumar

and K. Chandra 430

Effect of An Electric Field on the De Haas-Van AlphenOscillations : Sudheer M. Phatak and Abbas A. Rangwala 433

Magnetic Properties of Ni,-Fe-Cr Alloys : A. Sinha and

A. K. Majumdar 436

Orbital Magnetic Susceptibility of Divalent HCP Metals :

S. P. Mohanty and P. K. Misra 437

Spin Susceptibility of Interacting Electrons in Metals :

S.K. Misra and P.K. Misra 438

Isotropic Ferromagnets with Biquadratic Interactions :

G. Chaddha 439

An Anisotropic Heisenberg Antiferromagnet Using theSecond-Order Green's Function Theory : R. Brahmachariand S. B. Bhattacharya 441

A Uni-Axial Heisenberg Ferromagnet : R. Brahmachariand K. G. Chakraborty 444

Itinerant Actiferromagnetism in Hubbard Model ;

K. Eapen and D. K. Ghosh 448

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Pagl-

Spin Correlation Functions in Magnetic Polymers :

Mustansir 'Barma 452

Solution of the Three Magnon Bound State Equation :

C.K. Majumdar and Indrani Bose 456

Theory of Magnetic Susceptibility of Tetrahedral

Semiconductors : T. Sahu and P. K. Misra 459

Quantum Effects on Coupled Transitions :

B.K. Chakrabarti 463

Magnetoresistance in Spin Glasses : A. K. Nigam and

A.K, Majumdar 467

Magnetic Contribution to the Electrical Conductivity in

Spin Glasses : Abhijit Mookerjee 470

Two Approaches to Spin-Glass Phase Transitions :

S.G. Satyanarayana,: N. Devaraj and N. Kumar 473

Excitations in Spin Glasses : Renu Bhargava and D.Kumar 476

Thermodynamics of a Simple Site Quenched MagneticMixture : N. K. Jaggi and K. R. P. M. Rao 480

Cobalt-Gallium Alloys : A Cluster Spin-Glass System? :

R. Vijayaraghavan, A. K. Grover, L. C. Gupta, K, Asayama,M. Matsumura, M. Nakano and K. Ueno . 483

Antiferromagnetism in Mixed Heusler Alloy (Cu, Pd),Mn Al : S. K. Paranjpe, Wathik N. A. Raazak and

R. J. Begum 486

Moment Distributions in Nickel-Ruthenium Alloys :

R. Chakravarthy, L. Madhav Rao, Z. Jirak and

N. S. Satya Murthy 489

Magnetic Properties of the System Znj^COgCr^Se^ :

S. G. Gokarn, H. V. Kiran, A. L. Shashimohan,

D.K. Chakrabarty andA B. Biswas 492

Study of Phase Transition in Ferrous Fluoborate

Hexahydrate at 274 K : B. K. Chaudhuri and K. Das 496

-XIV'

• Studies on Paramagnetic Defects and Weiss Constant

in CaSO s By end CaSO : Bi Phosphors : S. H. Pawar,M, R. Mulla and S. G. Saftais

Hyperfine Field Studies in Magnetically Ordered

Samarium Alloys ; R. Vijayaraghavan

Transferred Hyperfine Effects in the 3iP NMR of Rare •

Earth Phosphates : M. Bose, M. Bhattacharya and

S. Ganguli

3• Co NMR Studies of the Spin-State Equilibria in Rare

Earth Cobaltates ; M, Bose, A. Ghoshray, A. Basu,S. Kollall and C. N. R. Rao

NMR in Ferromagnetic Cobalt Heusier Alloys s

V. Nagarajan

Hyperfine Field Studies in Gold Based Heusier Alloys ;

A. K. Graver, LVDang Khoi and P. Veillet

Mossbauer Study of Epidotes and Pyroxyenes of Indian

Origin : R. P. Tripathi, Usha Chandra, A, Krishnamurthy

am' .-', Lokanathan

A Mossbauer Spectroscopy Study of Natural Alteration of

Tlmenites : N. K. Jaggi, K. R. P M. Rao and

N. P, Subramanyam

Calculation of Second Order Doppler Shift for a Lattice

Containing Point Defect : S. K. Roy, K, Momon Singh and

D. L. Bhattacharya

Lithium NMR in Single Crystal of Lithium CopperChloride

, ZH-jO s V. Nagarajan and N. C. Vissia

Zero-Field NMR Studies in Ferrlmagnetic'Mn2Sb :

K. V. S. Rama Rao, S. L. Pinjare and C, Ramasastry

. '2+Ground State Wave Function and &* g of Cu loa :

B. N. Misra, Faujdar and Ram Kripal

NMR Determination of Hydrogen Atom Positions in

Crystalline Hydrates : V. Nagarajan and T. F. Sunderraj

Mossbauer Effect Study of 83Kr in Rubidium Halides :

D. C. Gupta, N. D, Sharma and Jahan Singh

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Magnetic Susceptibility of ZnMn.O -MgAl O

CdMn204-MgAl204 Systems : M^G. Bodaff,

H. V. Keer and A. B. Biswas 536

Magnetic Behaviour of Transition Ion Complexes with

Different Llgands : B. N. Misra and Ram Kripal 539

Effect of Spontaneous Polarization on D-Tensor of

Mn - Doped in Ferroelectric NaN02 : Akhilesh Kumar

Jain and G. C. Upreti542

Temperature and Angular Variation of Line Widths and

Spin Hamiltonian Parameters of EPR Spectra of Mn

in Sodium Nitrite : Akhilesh Kumar Jain and G. C. Upreti 546

ESR Study of Cr Centre in the Ferroelectric Ammonium

Sulphate.: C. V. Manjunath and R. Srinivasan 549

Low Temperature Phase Transitions in Lanthanide Double

Sulphates : V. M. Malhotra and H. D. Bist552

Observation and Study of Electron Paramagnetic Resonance

of Vanadyl Ions Doped in Some Paramagnetic Tuttcm Salts :

R. S. Saraswat and G. C. Upreti 555

2+ESR Study of Mn - Doped Dicalcium Barium Propionate ;

V. Dhar, N. C. Mishra and R. Srinivasan 558

Optical and E. S. R. Studies of X-Irradiated Potassium

Zinc Sulphate Hexa Hydrate Doped with Nickel: S. Madhu

and B. S. V. S. R. Acharyulu

Electron Spin Resonance Studies of 31 Electron Oxides :

N. Hariharan 563

561

ESR Study of rj -Irradiated Cd(BrO ),. 2H20 : D. L. Sastry

and K. V. S. Rama Rao 566

Temperature Dependent EPR of Mn2+ in TMCC and T MCC :

K. K. Surendran, K. V. Lingam, M.J. Rao and

B.N. Bhattacharya567

Jahn Teller Effect of Cu2+ Ion: An EPR Study :

K. K. Surendran, K. V. Lingam, M. J. Rao and

B.N. Bhattacharya 570

Jahn-Teller Effect in Copper Doped Zinc Tris

(Ethylenediamine) Chloride : S. G. Sastry, M. J. Rao,

K. V. Lingam and B. N. Bhattacharya 573

-xvi-

E. S. R. Study of Cu++ Doped CdIm3S04H20 :

R.K. Sharma, K, V. Lingam, M.J. Rao and

B.N. Bhattacharya 576

ESR Study of NO Radical in Rb2 Th (N03)6 :

T. K. Gundu Rao, K. V. Lingam and B. N. Bhattacharya 579

Nof+ Radical in K2(U02) (N©3)4 : An ESR Study :

T.K. Gundu Rao, K. V. Lingam and B.N. Bhattacharya 582

Rotary Modes In the Molecule 2-Amino~5-ChloropyridineUsing NQR Data : S. P. Basavaraju and N. Devaraj 585

Zeeman Effect of Chlorine NQR and Intramolecular

Hydrogen Bonding in 2, 5-Dichlorophenol :

R. Chandramani, N. Devaraj, K. R. Sridharan and

J, Ramakrishna 589

Nuclear Quadrupote Resonance Investigations in Phaspha-zenes n : Study of Ethylene Diamino Tetrachloro Trimeric

Cyciophosphazene : K. R. Sridharan, J. Ramakrishna and

S. S. Krishmamurthy 590

V. OPTICAL PROPERTIES OF SOLIDS

Pure and Rare Earth Doped ZnO Electroluminors :

S. Bhushan, A.N. Pandey and Balakrishna Rao Kaza 591

2+Optical and Transport Properties of RoI:Sn Crystals :

S. B. S. Sastry, K. Balasubramanyam, S. Madhu and

B. S. V. S. R. Acharyulu 596

Ultra-Violet Absorption Produced by Phosphorus Ion

Implantation of Fused Silica : J. M. Luthra, P. K. Bhattacharyaand N. Sarma 599

Nature of Defects in NaF:LiF : S. V. Moharil and

B. T. Deshmukh 603

Fluorescence and Excitation Spectra of NH4Br+TlBr Mixed

Phosphor : V, B. Sharan, D. N. S. Srivastwa and S. C. Sen 606

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Pape

AC Electroluminescence in ZnS Thin Films :

John Sebastian and R. N. Karekar 610

Pure Crystal Phosphorescence of 1-NaphthoI audits

Mechanism : N. S. Gangakhedkar and N. K. Chaudhuri 611

Anomalous Effect of Low Doping on Vibrational Exciton

Splitting in Benzoic Acid Single Crystals : A. V,. Namjoshi and

N.K. Chaudhuri 615

Triplet Exciton Traps in Pure Acetanilide Crystals :

A. V. Namjoshi and N. K. Chaudhuri 619

Photoconduction in Benzanthrone Thin Film : M. R. Padhye,

T. S. Varadarajan and L. N. Chaturvedi 622

Two-Phonon Resonant Raman Scattering in Silicon :

K. P. Jain and C. S. Jayanthi 626

The Valence Band Anomaly In GaSe : Rita Gupta 629

Photoconductivity of Alkali Doped CdS Thin Films :

S. H. Pawar, A. G. Shikalgar and B. B. Bargale 633

Infrared Laser by Proton Tunnelling r Pradip N. Ghosh and

D. L. Bhattacharya 637

Electronic Dielectric Constant Versus Interatomic

Distance ln'AN B8 Compounds : K. C. Rustagi 640

Laser Excited Raman Spectrum and Vibrational Dynamics

of MnCl ,

2H O : B. K. Srivastava, D. P. Khandelwal and

H.D. Bi2st L644

A Tunable Coherent Source at 16 nm Using Nonlinear

Optical Mixing in Solids : P. K. Gupta and K. C. Rustagi 648

Resonant Modes due to H -D Pair Impurity in KC1 r

R.K. Gupta, A.K. Singh and P. Mathur 651

Resonant Modes due to H Ions in Alkali Halides

Containing Additive Cation Impurity : R. K. Gupta and

A.K. Singh652

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EMS.

Anisotropy of Folarlsabilitles and Internal Field in

Crystals s D. Revannasiddaiah and D. Krishmamurti 653

VI. INSTRUMENTATION FOR SOLID STATE STUDIES

Design and Construction of a Solid State Pulsed NMR

Spectrometer ; R. K. Shenoy and J. Ramakrishna 655

A High Speed Digital Signal Averager for Pulsed NMR:

R, Srinivaaan, J. Ramakrishna and S. R, Rajagopalan 659

Minimisation oi Phase Distortion in Pulsed NMR

Studies s R.N. Roy 662

Deposition and TEM Studies of Aged YF3 and TbF

Thin Films : U. Kumar, P.N. Singh, S.K. Agarwal;A. K. Nigam and S. P. Singh 665

Thickness Measurement of Thin Films by XRF Analysis

and its Comparison with Quartz Crystal Oscillator

Technique : D.K. Kauahik, S. Priyokumar Singh,S.K. Chattopadhyaya and N. Nath 667

An I. C. Pulse Interference Technique for Measurement

of Ultrasonic Velocities in Solids : V. Kesava Raju and

P. Jayarama Reddy 669

A He-Cd Laser for Raman Studies : M, L, Bansal 672

A 3 - Sample, 6 - Lead Brldgman Anvil Assembly for

Resistivity Measurements to 100 KBAR : V. Sankara

astry, Rita Kapoor and K. Govinda Rajan 675

A 30KeV Ion Implantation System with a Velocity Filter

for Mass Separation s G. S. Vlrdi, M. D. Agarwal,

S. K. Chattopadhyaya, V. K. Mathur and N. Nath 679

Temperature Controller for Magnetic SusceptibilityMeasurement : A. Khan and C.K. Majumdar 680

Electrical Conductivity of a Vacuum Evaporated Germanium

Films Using a New Type of Sample Holder : K. K. Bhale and

S. S. Shah 682

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Simple Resistance Technique to Measure the

Activation Energy and Mobility of Electromigration in

Amorphous Semiconductors : O. S. Panwar, D. R. Goyal,A. Kumar, K. K. Srivastava and K. N, Lakshminarayan 683

Design of an Indigenous Light Scattering Dust Particle

Counter : Chatar Singh, S.K. Chattopadhyaya,V. K. Mathur and N. Nath 686

AUTHOR INDEX 692