ADVANCES IN FERRITES Proceedings of the Fifth International Conference on Ferrites January 10-13, 1989, Bombay, India

Editors

C M SRIVASTAVA M.J. PATNI Organised by

Indian Institute of Technology Bombay, 400076, India

Volume 1

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OXFORD & IBH PUBLISHING CO. PVT. LTD. New Delhi

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CONTENTS OF VOLUME 1

Preface : The Editors Greetings: T. Takei Message : M. Louis Neel Greetings: Alex Goldman Greetings : William H. Rhodes Welcome Address : B. Nag Greetings : P.R. Bapat Greetings : F.J. Friedlaender Remarks : B.B. Ghate Inaugural Address : P.S. Deodhar Vote of Thanks : CM. Srivastava Thanks : H.P.J. Wijn Sponsors and Committees

xvii xix xxi xxii xxiii xxiv xxv xxvi xxviii xxxi xxxii xxxv xxxvi

PLENARY SESSION Research Trends of Magnetic Amorphous Oxides M. Sugimoto Future Trends in Soft Ferrite Processing Alex Goldman

3 13

SECTION 1: FERRITE PROCESSING Powder Preparation Long Term Availability of Spray Roasted Iron Oxides for the Production of Ferrites Michael J. Ruthner Production of Highly Pure Oxide Using a Solvent Extraction Method Akira Chiba and Osamu Kimura Preparation and Properties of Fine Particle Mg-Mn Ferrite S. Sundar Manoharan and K.C. Patil Formation of Spinels from Cerium and Europium Ferrocyanides Ramachandra Bhat, H.V. Keer, P. Raj and A. Sathyamoorthy Synthesis of Ultrafine Particles of Strontium Ferrite by Chemical Coprecipitation with Sodium Hydroxide S.K. Date, C.E. Deshpande, S.D. Kulkarni and /./. Shrotri

23

35 43 49 55

IV

lithium Insertion into y-Fe2O3

61

M. Pernet, J. Rodriguez, M. Gondrand, J. Fontcuberta, P. Strobel and J.C. Joubert

Preparation of Alkaline Earth Ferrites from Decomposition of Malonate Solid Solutions

67

P.S. Bassi, B.S. Randhawa and Sandeep Kaur

Reactions Oxidation State/Green Strength Relationships in Mn-Zn Ferrites

75

D. Broussaud, M. Abouaf, P. Perriat and J.L. Rolland

Reaction Mechanism of Ferrite-Formation by Oxidation of Fe (II) Ion in Aqueous Solution

83

Y. Tamaura, T. Itoh and M. Abe

The Precipitation of Hematite from FeZn Ferrites

89

T. Shigematsu, T. Kubo and N. Nakanishi

Structural and Oxidation State Transformations during Sintering of Mn-Zn Ferrites

95

D. he Roux, F. Onno and P. Perriat

Preparation of High Density Mn-Zn Ferrite

103

K. Suresh and K.C. Patil

Morphological Study on the Oxidation of Mn-Zn Ferrite

109

M.G. Kim and H.I. Yoo

Stabilisation Studies on Chromium Dioxide Powders

115

V.A. Jaleel, M. Ranjan and T.S. Kannan

Formation of New Hexaferrite with Mixed P - Alumina and Magnetoplumbite Structure

121

Shinya NariM, Shigeru Ito, Seishi Fujiwara and Noboru Yoneda

Manufacturing Modern Technology for Modern Ferrites E.Roess On the Plastification of PVA by PEG

129 137

A. Morell, A. Eranian, B. Peron and P. Beuzelin

Mercury Porosimetry in Ferrite Green Body

143

Y. Mano, T. Mochizuki and I. Sasaki

Modern Mixing, Grinding and Pelletizing Procedures for the Preparation of Oxide Raw Materials, Especially of Ferrite Raw Materials

155

Hans B. Ries

SECTION 2: SINTERING AND MICROSTRUCTURE Sintering and Microstructure Development of Sr Hexaferrites S. Besenicar, M. Drofenik and D. Kolar

163

V

Exaggerated Grain Growth in Manganese Zinc Ferrite Osamu Kimura Effect of Hot Isostatic Pressing Treatment on Densification of Lithium Zinc Ferrite Materials He Rui-yun, Chen Xiao-li and Li Shu-xiang The Influence of SiO 2 /GeO 2 Additions on the Grain Growth Kinetics and Densification of Ni-Zn Ferrites Satbir Singh, R.B. Tripathi and B.K. Das Development of Glass Ceramics with Hexaferrites as Magnetic Phases

169 177

183

189

D. Bahadur and D. Chakravorty SECTION 3: PHYSICS OF FERRITES Structure, Electrical and Elastic Properties High Resolution Electron Microscopy and Microanalysis of Ferrites and Cuprates Gareth Thomas Phenomenology of the Acoustic Emission Along Hysteresis Loop of Polycrystalline Ferrimagnets M. Guyot and T. Merceron Influence of Microstructure and Composition on the Acoustic Emission in Polycrystalline Ferrimagnets M. Guyot, T. Merceron and V. Cagan AC Electrical and Magnetic Measurement of a NiZn Ferrite ].T.S Irvine, A.R. West, A. Huanosta and R. Valenzuek Dispersion in Electrical Properties of Titanium Substituted Lithium Ferrites Bijoy K. Kuanr, G.P. Srivastava and Pran Kishan Dielectric Properties and X-ray Photo Electron Spectroscopy Studies on Substituted Lithium Ferrites V.R.K. Murthy, R. Raman and B. Viswanathan Electrical and Magnetic Properties of Normal and Hot Pressed Mn0.6Zn0.4NixFe2O4 Ferrites R.K. Puri, Vijay K. Babbar and R.G. Mendiratta Electrical and Magnetic Properties of Sn4* Substituted Ni-Cd Ferrites R.K. Puri and Vijayalakshmi Satyen Hopping Mechanism in Fe3.xZnxO4 S.N. Bhatia and P.B. Joshi Anomalous D.C. Resistivity and Microstructural Characterization of Sn4+ and Zn2* Substituted Nickel Ferrites Usha Varshney, R.J. Churchill, R.K. Puri and R.G. Mendiratta

197

205

215

221 227

233

239

245

249 255

VI

On Some Unconventional Dielectric Relaxation in Epoxy-ferrite Composites V. Jha and A.K. Banthia Pentavalent Vanadium Ion Addition to Ni-Zn Ferrites-Dielectric Properties Ram Narayan, R.B. Tripathi and B.K. Das Magnetostriction of Terbium-Yttrium-Iron Garnets S. Holtmeier, M. Guillot, W. Joss, J.M.V. Ruitenbeck, J.M. Desvignes and H. Le Gall Piezomagnetic Properties of the Nickel Base Ferrites Zbigniew Kaczkozvski Temperature and Magnetic Field Influence on the Magnetomechanical Coupling Coefficient of the o.S3

o27

261

267

273

279 287

.o2

Zbigniew Kaczkowski The Dependence of Strength on Composition and Processing in MnZn Ferrites R.C. Neyts and W.M. Dawson Elastic Properties of Strontium Borate Ferrites by Ultrasonics S.S. Bhatti and Anand Pal Singh Compressibility and Mechanical Strength of Mn-Zn Ferrites with PVA and PEG Binders P. Rambaldini, A. Morell and O. Sagnes Composition and Magnetic Field Dependence of the Elastic Moduli of Polycrystalline Ferrites M.L. Chary, C.N. Rao and S.R. Murthy

293

299 305

315

Mossbauer Studies Cation Distribution in Co-Ti Substituted Barium Ferrite Q.A. Pankhurst, D.H. Jones, A.H. Morrish, X.Z. Zhou and A.R. Corradi Magnetic Properties and Mossbauer Studies of Hot Pressed M n ^ Z n ^ C o ^ e p , Ferrites R.K. Puri, Vijay K. Babbar and R.G. Mendiratta Effect of Nonstoichiometry on the Mossbauer Spectra and Magnetic Properties in Yttrium-Gadolinium-Iron Garnet Shu-Xiang Li, Zhi-quan Han and Xin-shu Chen Conversion Electron Mossbauer Spectroscopy Study on a Fe74Ni2Cr4B12Sig Alloy R.V. Vadnere, S.N. Shringi, Shiva Prasad, A.K. Nigam, Girish Chandra and R. Krishnan Local Canted State in Li-Al Ferrite M. Nogues, J.L. Dormann, ]. Maknani, G. Villers and Y. Dumond Mossbauer and Magnetic Studies of Nia4Zn0^2xLixFe2+xO4 R.K. Puri, Reshmi Mitra and R.G. Mendiratta

323

329

335

341

347 353

Vll

Mossbauer and Magnetic Studies of Titanium Doped Nickel Ferrite

359

R.C. Srivastava, D.C. Khan, A.R. Das and T.M. Srinivasan

Hyperfine Interaction Studies in Li-Cr-Ti Ferrites and the Possibility of Existence of a Spin Glass Phase

365

G.S. Baijal, Deepika Kothari and Sumitra Phanjoubam

Influence of Tetravalent Tin Substitution on the Properties of Nickel Ferrites

371

J.S. Baijal, Deepika Kothari and Sumitra Phanjoubam

Structural, Transport, Magnetic, Mossbauer and Infra-red Studies of the Spinel Ferrite System Znj xCoxFeCrO4

377

Prabha Nathwani Jhaveri, Pushan Ayyub and V.S. Darshane

Magnetic Properties Neutron Diffraction Survey of Perturbed Magnetic Ordering in Disordered Spinels

385

L. Madhav Rao

Magnetic Properties of Co and Ti Co-substituted Mn Zn Ferrites

399

M.T. Johnson

Non-repeatability of Disaccommodation, an Investigation of High Permeability Ferrites

405

Dinesh K. Gupta and James O. Viehl

Magnetic Properties of Sr-La-Nd-Pr System Ferrite Magnets

411

Hiroshi Yamamoto, Mitsuru Nagakura and Ichiro Uno

The Effect of A12O3 Substitution on the Microstructure and Coercivity of Polycrystalline SrFe12O19

417

F. Kools and B. Henket

High Field Magnetization Study of Doped Barium Ferrite

423

X. Battle, M. Pernet, X. Obradors, M. Vallet-Regi

Time and Temperature Dependence of the Thermoremanence and Hysteresis Loop in Li-Ti Ferrite

429

J.L. Dormann, M. Nogues, G. Villers M.El. Harfaaui and M. Seqqat

Exchange Split Ground State for Fe2* Ions in High Permeability Mn-Zn Ferrites

435

N. Venkataramani, CM. Srivastava and M.J. Patni

Study of Tetravalent Ge4*, Ti4* and Sn4* Ions Substituted Magnesium Ferrites

441

D.R. Sagar, Chandra Prakash, S.N. Chatterjee and Pran Kishan

Magnetic Properties of Substituted Lithium Ferrites

447

V.R.K. Murthy, R. Raman and B. Viswanathan

Lattice Parameter and Bulk Magnetic Studies of Zr Substituted Cu-Zn Ferrites

453

S.R. Jadhav, S.R. Sawant, S.S. Suryavanshi, S.A.Patil and R.N. Patil

Sperimagnetism in Lithium Vanadium Ferrites S.V. Salvi and V.P. Khanolkar

459

Vlll

On Enhancing of Weak Ferromagnetism of Haematite Doped with Lithium S.V. Salvi, V.P. Khanolkar and Suresh Sundareswaran

465

Anisotropy Magnetic Anisotropy of Hexaferrites Hongru Zhai, You Xu, Jizhe Liu, Guilin Yang, Mu Lu, Tongzheng Jin, Zijun Wang, Benxi Gu and Shiyin Han Calculation on the Temperature Dependence of Magnetocrystalline Anisotropy of Ferrite BaFe12O19 Zhitao Diao The Calculation of the Magnetocrystalline Anisotropy of BaM Ferrite Xu You, Chu Doping, Yang Guiling and Zhai Hongru Torque and FMR Studies in Co-Ag Multilayers R. Krishnan, M. Porte and M. Tessier Stress Induced Magnetic Anisotropy of YBi2Fe^xGaxOI2 Sputtered Films Y. Kigami, T. Namikawa and Y. Yamazaki

473

479

485

491 499

SECTION 4 : THIN FILMS AND CRYSTAL GROWTH Thin Films Magnetic Properties of Spinel/BaM Ferrites Multilayered Films by Alternate Sputtering K. Matsumoto, M. Yata, S. Nakagawa and M. Naoe Magnetic Properties and Structure of Bias-sputtered Fe-Cu Films by Facing Targets Sputtering T. Hirata and M. Naoe Crystallinity and Magnetic Properties of Co-Cr Thin Films Prepared by Multilayer Sputtering Technique Shigeki Nakagawa, Makoto Sumide, Setsuo Akiyama and Masahiko Naoe Synthesis of Ferrite Films by Pulsed Laser Evaporation Process V.N. Koinkar, RashmiNawathey, S.M. Chaudhari, S.M. Kanetkar, S.K. Date and S.B. Ogale Ba-Ferrite Thin Films by Pyrolisis Process M. Matsumoto, A. Morisako and T. Hae-iwa Growth and Characterization of Electrochemically Formed Thin Film Ferrites G.M. Ganu, R. Aiyar and P.D. Prabhawalkar Preparation of Mn-Zn Ferrite Thin Films with Good Crystallinity at Substrate Temperature of 100°C K. Matsumoto, S. Nakagawa and M. Naoe

507

513

519

525

533 539

545

IX

Magnetic Properties of Fe/Ti Multilayered Films Deposited by Facing Targets Sputtering S. Ono, M. Nitta and M. Naoe

551

Crystal Growth Crystal Structure and Magnetic Properties of the Lanthanum559 Sodium Hexaferrite La07Na03Fe12O19 H. Vincent, D.Le Roux and ].C. Joubert Characterization of Mn-Zn Ferrite Single Crystals with Trace Additives 565 K. Matsuyama, S. Shimizu, K. Watanabe, K. Hirota and K. Kugimiya Crystal Structure and Magnetic Properties of New Ionic Conductors"-p" 571 Alumina-like Ferrites and Derived Phases by Ion Exchange H. Vincent, A. Bekka, S. Nicolopoulos, M. Anne, J.C. Joubert, O. Kalogirou, D. Samaras and J. Gonzalez-Calbet SECTION 5 : POWER FERRITES Some Aspects of Ferrite Cores for H.F. Power Transformers E.C. Snelling Power Ferrites; Performance and Microstructure Th. G.W. Stijntjes A New Power Ferrite for High Frequency Switching Power Supplies T. Sana, A. Morita and A. Matsukawa Domain Wall Loss and Rotational Loss in High Frequency Power Ferrites E.G. Visser, J.J. Roelofsma and G.JM Aaftink Nickel Zinc Ferrites for Induction Accelerators y. Xu, S. Simizu, D. Petasis, Rita Ramachandran, S.G. Sankar, W.E. Wallace and W.C. Turner Relations between Grain Boundary Structure and Hysteresis Losses in Mn-Zn Ferrites for Power Applications M.H. Berger, J.Y. Laval, F. Kook and /. Roelofsma Stress-Insensitive Ferrite for Microinductors M. Kumagai and Y. Ikeda

579 587 595

605 611 619

625

SECTION 6 : INSTRUMENTATION AND MEASUREMENTS Measurement of Complex Magnetic Permeability and Complex Dielectric Permittivity of Ferrites between 50 GHz and 400 GHz Mohammed Nural Afsar New Approach to the Determination of Spatial Features of Granular Structure T. Postupolski

633

639

Development of Toroidal Plasma (TP) Magnetron Sputtering System for Deposition of Magnetic Films Takakazu Takahashi, Masaaki Yoneda and Masahiko Naoe Discussion on the Measuring Condition of Air Permeability Method S. Ishikaxva, T. Mochizuki and I. Sasaki Index

645

651