Ferromagnetic Resonance

Ferromagnetic Resonance is a comprehensive account of the basic theory of ferromagnetic resonance, that is, the resonant absorption of a high-frequency magnetic field in ferromagnetic substances. Topics covered include magnetic resonance in ferromagnetics and antiferromagnetics as excitation of spin waves; relaxation processes in ferromagnetic dielectrics; ferromagnetic resonance in metals; and line width of ferromagnetic resonance absorption. Nonlinear processes in ferrites in UHF fields are also discussed.
This volume is comprised of nine chapters and begins with an introduction to magnetic resonance in ferromagnetics and the phenomenological theory of ferromagnetic resonance, with emphasis on factors that affect resonance frequency such as shape, crystal magnetic anisotropy, and domain structure. The theory of ferromagnetic resonance in a linear approximation is also considered, along with ferromagnetic resonance in metals and line width of ferromagnetic resonance absorption. The last chapters describe nonlinear processes that occur during ferromagnetic resonance in ferrites.
This book will be a useful resource for physicists and physic students.

Contenu

Editor's Foreword
Chapter I. Magnetic Resonance in Ferromagnetics
Chapter II. Phenomenological Theory of Ferromagnetic Resonance

1. Introduction
2. Equation of Motion for the Magnetization of a System of Weakly Interacting Magnetic Electron Moments
3. Effective Internal Field in a Ferromagnetic. General Formula for the Resonance Frequency
4. The Effect of Shape on the Resonance Frequency
5. The Effect of Crystal Magnetic Anisotropy on the Resonance Frequency
6. The Effect of Domain Structure on the Resonance Frequency
7. The Effect of Sub-lattice Structure of Ferromagnetic Semi-conductors on the Resonance Frequency
8. Phenomenological Approach to Damping in the Equation of Motion for the Magnetization of a Ferromagnetic
9. Thermodynamic Theory of Resonance Phenomena in Ferromagnetics
10. Line Width of Resonance Absorption
11. Solution of Equations of Motion in the Case of Weak Radio-Frequency Fields. Dynamic Permeability Tensor
12. Dispersion Relations in the Theory of Ferromagnetic Resonance
    Chapter III. Magnetic Resonance in Ferromagnetics and Antiferromagnetics as Excitation of Spin Waves
13. Spin Waves or Magnons
14. Excitation of Ferromagnons by a High-frequency Electromagnetic Field
15. General Phenomenological Theory of Spin Waves in Ferromagnetics and Antiferromagnetics
16. Spin Waves in a Ferromagnetic including Anisotropy and Demagnetizing Fields
17. Spin Waves in an Antiferromagnetic
18. Spin Waves and Magnetic Resonance in Ferrimagnetics
19. Weak Ferromagnetism
    Chapter IV. Relaxation Processes in Ferromagnetic Dielectrics
    Chapter V. Features of Ferromagnetic Resonance in Metals
    A. Influence of Skin Effect and Exchange Interaction on Ferromagnetic Resonance in Metals
20. Qualitative Examination
21. Initial Equations
22. Equivalent Permeability when a Specimen of Ferromagnetic Material is magnetized Parallel to its Surface
23. Discussion of Results and Comparison with Experiment
24. Equivalent Permeability when a Ferromagnetic Specimen is magnetized at Right Angles to its Surface
    B. Influence of Conduction Electrons on Ferromagnetic Resonance
25. Energy of Interaction of a Ferromagnetic's Magnetization with Conduction Electrons
26. Spin-Electron Relaxation and Line Width
27. Resonance Frequencies in a Ferromagnetic Metal
28. Final Remarks
    Chapter VI. Line Width of Ferromagnetic Resonance Absorption
    A. Basic Experimental Data
29. Reasons for Line Width in Real Ferromagnetic Crystals
30. Line Width as a Function of Temperature in Single Crystals
31. Other Factors affecting Line Width
    B. Survey of Theoretical Ideas on the Nature of the Line Width
32. Spin-Spin Relaxation
33. Line Width in Metals
34. Inhomogeneities in Magnetic Structure
35. Line Width in Rare-earth Iron Garnets
36. Iron Ions of Different Valencies in Octahedral Sites of Ferrospinel
37. Conclusions
    Chapter VII. Non-Uniform Resonance and Spin Waves
    Chapter VIII. Non-Linear Processes in Ferrites in U.H.F. Fields
38. Introduction
39. Solution of the Landau-Lifshitz Equation by the Method of Successive Approximations
40. "Law of Conservation" of the Degree of Magnetization
41. Detection
42. Frequency Doubling
43. Frequency Conversion in the Case of Two Transverse Alternating Fields
44. Frequency Conversion in the Case of Longitudinal and Transverse Alternating Fields
45. Ferrite Oscillator and Amplifier
    Chapter IX. Eigen Oscillations and Non-Linear Phenomena in a Ferrite
46. Introduction
47. Non-uniform Modes of Precession in a Ferrite
    (1) Basic Results of the Theory
    (2) Methods of recognizing Resonance Lines
    (3) Results of Experimental Study
48. Non-linear Phenomena in a Ferrite
    (1) Basic Results of the Theory
    (2) Results of Experimental Investigations
49. Conclusion
    References
    Author Index
    Subject Index
    Other Titles in the Series