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  • Spin wave amplification: electron mechanisms

Spin wave amplification: electron mechanisms

V.D.Lakhno. Spin wave amplification: electron mechanisms. –
New York : Nova Science Publishers Inc., 1992, 118 p.

 

Содержание :

Название      Cтраницы
NOTATION ix
PREFACE xi
INTRODUCTION 1
PART 1.
Magnetic Susceptibility
1.1. Magnetic Susceptibility of an Antiferromagnet in the Absence of s-f Exchange 7
1.2. Landau-Lifshits Equation for an Antiferromagnet in the Presence of s-f Exchange 11
1.3. Hydrodynamic Theory of Magnetic Susceptibility in the Presence of s-f Exchange 13
1.4. Susceptibility Tensor cF (k , w): Its Properties and Applications 17
PART 2.
Exchange Amplification of Spin Waves in Magnetically Ordered Crystals
2.1. Amplification of Spin Waves in Antiferromagnets and Ferromagnets: Qualitative Differences 21
2.2. Amplification of Spin Waves in a Longitudinal Field 22
2.3. Amplification of Spin Waves in Crossed Fields 26
2.4. Attenuation of Spin Waves: Its Effects 28
2.5. Electron Heating: Its Effect 30
2.6. Antiferromagnetic Resonance in Superconducting Antiferromagnets: Specifics 30
2.7. Propagation of Sound in Conducting Magnets 31
2.8. Nonexchange Mechanisms of Spin Wave Amplification 34
PART 3.
Amplification of Spin Waves in Anisotropic Antiferromagnets: A Macroscopic Theory
3.1. Amplification of Spin Waves in an Easy Plane Antiferromagnet in a Magnetic Field Parallel to the Anisotropy Axis 39
3.2. Amplification of Spin Waves in an Easy Plane Antiferromagnet in a Magnetic Field Perpendicular to the Anisotropy Axis 44
PART 4.
The s-f Exchange Attenuation and Amplification of Spin Waves in Ferrimagnets: A Hydrodynamic Theory
4.1. Hydrodynamic Model 49
4.2. Magnetic Susceptibility and Spin Wave Spectrum 50
4.3. Precession of Magnetization for the Eigen Frequencies in an Isotropic Ferrimagnet 53
4.4. Amplification of Spin Waves 56
4.5. Amplification (Attenuation) of Spin Waves Near a Compensation Point: Special Features 57
4.6. Concluding Remarks 58
PART 5.
Magnetoplasma Effects in s-f Exchange Amplification of Spin Waves
5.1. Magnetic Susceptibility Tensor and Conductivity 61
5.2. Kinetic Approach: Its Results 62
5.3. Resonance Effects 66
PART 6.
Multiple-Carrier Theory
6.1. Two Types of Carriers 69
6.2. Amplification of Spin Waves in Crossed Fields 72
6.3. Amplification of Spin Waves in a Weak Magnetic Field 73
PART 7.
Amplification of Spin Waves in Disordered Magnets
7.1. General 77
7.2. Spin Glass in the Absence of Current Carriers 77
7.3. The s-f Exchange Mechanism for the Amplification of Spin Waves in Spin Glass 78
7.4. Use of Spin Glass for Spin Wave Amplification 81
PART 8.
Radioelectric Effect in Antiferromagnets
83
PART 9.
Magnetoelectric Resonance in Antiferromagnets
9.1. Nondiagonal Linear Response Function of Antiferromagnetic Semiconductors 85
9.2. Possible Applications 86
PART 10.
Quantum Theory of Spin Wave Amplification
10.1. Hamiltonian of s-f Exchange in an Antiferromagnet 89
10.2. Kinetic Equations 90
10.3. Spin Wave Amplification Coefficient in a Magnetic Field 94
10.4. Spin Wave Amplification Coefficient in Ultraquantum Limit 97
10.5. Amplification of Spin Waves in a Nonquantizing Field 99
CONCLUDING REMARKS 103
ANNEX A
Drifting Plasma: Its Dielectric Permittivity in Hydrodynamic Limit
105
ANNEX A
Coefficient of U-V Transformation for an Antiferromagnet in Noncollinear Phase
107

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