Spin Arrangements and Crystal Structure, Domains, and Micromagnetics

Spin Arrangements and Crystal Structure, Domains, and Micromagnetics deals with cooperative phenomena characterized by ordered arrangements of magnetic moments subject to strong mutual interactions. The emphasis is on the ferromagnetism, ferrimagnetism, and antiferromagnetism of magnetically ordered materials such as insulators and metals. Both theoretical and experimental points of view are presented.

Comprised of 12 chapters, this volume begins with an introduction to magnetism and crystal structure in nonmetals, followed by an evaluation of exchange interactions from experimental data. Subsequent chapters focus on the theory of neutron scattering by magnetic crystals; spin configuration of ionic structures; spin arrangements in metals; and permanent magnet materials. Fine particles, thin films, and exchange anisotropy are also considered, with particular reference to the effects of finite dimensions and interfaces on the basic properties of ferromagnets. The book also examines micromagnetics; domains and domain walls; the structure and switching of permalloy films; magnetization reversal in nonmetallic ferromagnets; and preparation and crystal synthesis of magnetic oxides.

This book will be a useful resource for professionals and students with physics or chemistry backgrounds.

Contenu

Contributors to Volume III
Preface
Contents of Volume I
Contents of Volume II

1. Magnetism and Crystal Structure in Nonmetals
   I. Some Important Nonmetallic Structures
   II. Description of Outer Electrons
   III. Applications to Magnetism
   References
2. Evaluation of Exchange Interactions from Experimental Data
   I. Introduction
   II. Isolated Clusters
   III. Antiferromagnetic Compounds
   IV. Ferrimagnetic Compounds
   V. Miscellaneous Comments and Conclusions
   VI. Recent Developments
   Appendix A. Molecular Field Relations
   References
   3· Theory of Neutron Scattering by Magnetic Crystals
   I. Introduction
   II. Basic Formulas for "Spin-Only" Magnetic Moments
   III. Diffuse Scattering in the Quasistatic Approximation
   IV. Inelastic Collisions
   V. Effects of Orbital Magnetism
   References
3. Spin Configuration of Ionic Structures: Theory and Practice
   Introduction
   I. Theoretical; the Macroscopic Theory
   II. Theoretical; the Microscopic Method (Matrix Method)
   III. Practice
   Appendix A. Decomposition of WRR'
   Appendix B. Some Remarks on Dipolar Energy
   Appendix C. Some Remarks on the Lyons-Kaplan and Other Methods
   References
4. Spin Arrangements in Metals
   I. Introduction
   II. Neutron Diffraction Techniques
   III. Spin Structures
   IV. Magnetic Form Factors and Spin Densities
   V. Conclusion
   References
5. Fine Particles, Thin Films and Exchange Anisotropy (Effects of Finite Dimensions and Interfaces on the Basic Properties of Ferromagnets)
   I. Introduction
   II. Fine Particles; Superparamagnetism
   III. Thin Films
   IV. Surface Anisotropy
   V. Exchange Anisotropy
   References
6. Permanent Magnet Materials
   I. Introduction
   II. Theory of Permanent Magnets as Fine Particle Materials
   III. Permanent Magnet Powder Materials
   IV. Permanent Magnet Alloys
   References
7. Micromagnetics
   I. Introduction
   II. Brown's Equations
   III. Solutions of Brown's Equations
   IV. Discussion
   References
8. Domains and Domain Walls
   I. Introduction
   II. Observation of Domain Structure
   III. Domain Structures
   IV. Domain Walls
   V. Antiferromagnetic Domains
   VI. Films and Teaching Aids
   References
9. The Structure and Switching of Permalloy Films
   I. Introduction
   II. Preparation and Structure
   III. Quasistatic Switching
   IV. Pulse Switching
   Appendix A. Dispersion Measurements
   Appendix B. Notation for Applied Fields
   References
10. Magnetization Reversal in Nonmetallic Ferromagnets
    I. Introduction
    II. Experimental Procedures and Results
    III. Equation of Motion of the Magnetization
    IV. Modes of Magnetization Reversal
    V. Conclusion
    References
    12· Preparation and Crystal Synthesis of Magnetic Oxides
    I. Polycrystalline Materials
    II. Preparation of Single Crystals
    References
    Author Index
    Subject Index