Spin Arrangements and Crystal Structure, Domains, and Micromagnetics (eBook)

Front Cover 1
Spin Arrangements and Crystal Structure, Domains, and Micromagnetics 4
Copyright Page 5
Table of Contents 10
Contributors to Volume III 6
Preface 8
Contents of Volume I 14
Contents of Volume II 16
Chapter 1. Magnetism and Crystal Structure in Nonmetals 18
I. Some Important Nonmetallic Structures 18
II. Description of Outer Electrons 41
III. Applications to Magnetism 54
References 76
Chapter 2. Evaluation of Exchange Interactions from Experimental Data 80
I. Introduction 80
II. Isolated Clusters 84
III. Antiferromagnetic Compounds 101
IV. Ferrimagnetic Compounds 120
V. Miscellaneous Comments and Conclusions 124
VI. Recent Developments 125
Appendix A: Molecular Field Relations 128
References 129
Chapter 3. Theory of Neutron Scattering by Magnetic Crystals 132
I. Introduction 132
II. Basic Formulas for "Spin-Only" Magnetic Moments 134
III. Diffuse Scattering in the Quasistatic Approximation 144
IV. Inelastic Collisions 153
V. Effects of Orbital Magnetism 159
References 163
Chapter 4. Spin Configuration of Ionic Structures: Theory and Practice 166
Introduction 167
I. Theoretical the Macroscopic Theory
II. Theoretical the Microscopic Method (Matrix Method)
III. Practice 196
Appendix A: Decomposition of WRR' 215
Appendix B: Some Remarks on Dipolar Energy 216
Appendix C: Some Remarks on the Lyons-Kaplan and Other Methods 218
References 222
Chapter 5. Spin Arrangements in Metals 228
I. Introduction 228
II. Neutron Diffraction Techniques 229
III. Spin Structures 236
IV. Magnetic Form Factors and Spin Densities 264
V. Conclusion 282
References 284
Chapter 6. Fine Particles, Thin Films and Exchange Anisotropy (Effects of Finite Dimensions and Interfaces on the Basic Properties of Ferromagnets) 288
I. Introduction 288
II. Fine Particles Superparamagnetism
III. Thin Films 315
IV. Surface Anisotropy 331
V. Exchange Anisotropy 340
References 361
Chapter 7. Permanent Magnet Material 368
I. Introduction 368
II. Theory of Permanent Magnets as Fine Particle Materials 370
III. Permanent Magnet Powder Materials 389
IV. Permanent Magnet Alloys 396
References 407
Chapter 8. Micromagnetics 412
I. Introduction 412
II. Brown's Equations 413
III. Solutions of Brown's Equations 416
IV. Discussion 426
References 430
Chapter 9. Domains and Domain Walls 432
I. Introduction 432
II. Observation of Domain Structure 433
III. Domain Structures 446
IV. Domain Walls 459
V. Antiferromagnetic Domains 470
VI. Films and Teaching Aids 476
References 478
Chapter 10. The Structure and Switching of Permalloy Films 482
I. Introduction 482
II. Preparation and Structure 485
III. Quasistatic Switching 499
IV. Pulse Switching 522
Appendix A: Dispersion Measurements 534
Appendix B: Notation for Applied Fields 537
References 538
Chapter 11. Magnetization Reversal in Nonmetallic Ferromagnets 542
I. Introduction 542
II. Experimental Procedures and Results 546
III. Equation of Motion of the Magnetization 549
IV. Modes of Magnetization Reversal 555
V. Conclusion 567
References 568
Chapter 12. Preparation and Crystal Synthesis of Magnetic Oxides 570
I. Polycrystalline Materials 570
II. Preparation of Single Crystals 597
References 612
Author Index 616
Subject Index 632