Relaxation processes in micromagnetics / Harry Suhl.

Format:

Book

Author/Creator:

Suhl, Harry.

Series:

International series of monographs on physics ; v. 133.

International series of monographs on physics ; 133

Language:

English

Subjects (All):

Magnetization.

Equations of motion.

Magnetic recorders and recording.

Physical Description:

xviii, 190 p. : ill.

Edition:

1st ed.

Place of Publication:

Oxford ; New York : Oxford University Press, 2007.

Summary:

This book throws some light on poorly understood aspects of the motion of magnetization in magnetic solids, particularly the effects of dissipative mechanisms. Aside from its practical aspects (such as magnetic recording), it addresses readers interested in the basic physics of nonlinear phenomena.

Contents:

Intro

Contents

Preface

Notations and conventions

1 The Classical Magnetization Field

1.1 Introduction

1.2 Equations of motion

1.2.1 Damping

1.3 Approaching the Curie temperature

2 Small motions of the Magnetization

2.1 Introduction

2.2 Models of small motions

2.2.1 Distributive damping

2.2.2 Instabilities and spin wave condensates

3 Intrinsic Damping

3.1 Introduction

3.2 Magnetostrictive coupling

3.2.1 Small samples

3.2.2 Large, homogeneous samples

3.3 Loss torque in magnetic metals

3.3.1 Eddy current damping

3.3.2 Direct coupling of conduction electrons to the magnetization field

3.4 Fluctuations in medium properties

3.5 Relaxation due to weakly coupled magnetic impurities

3.5.1 Slow relaxation

3.5.2 Corrections to the adiabatic limit

3.6 Appendix 3A. Inclusion of displacement current in Section 3.3.1

4 Fluctuations

4.1 Introduction

4.2 Fluctuation-dissipation theorem

4.3 Langevin equation, and generalized Langevin equation

4.4 Fokker-Planck equation-cartesians

4.4.1 Fokker-Planck equation in polar angles

4.4.2 Fokker-Planck equation in the absence of well-defined canonical variables

5 Magnetization Reversal in a Very Dilute Array of Small Particles

5.1 Introduction

5.2 General observations

5.3 Reversal in 2d

5.3.1 Reversal in the long time limit

5.3.2 Intermediate time scales

5.3.3 Applied field and anisotropy axis misaligned

5.3.4 Relation to first-passage type theories

5.4 Rotation in 3d

6 Magnetization Reversal in Arrays of Particles and Continuous Media

6.1 Introduction

6.2 Relaxation due to magnetic moment interaction in a sparse medium

6.2.1 Equations of motion for dipolar interaction

6.2.2 A single pair

6.3 More dense arrays of many interacting particles

6.3.1 The Arnold web.

6.3.2 Relevance to magnetic relaxation and reversal

6.3.3 Effective single-variable relaxation from causes other than chaos

6.4 Magnetization reversal and the magnetization process in large, dense systems

6.4.1 Simple model of magnetization reversal by domain wall motion

6.4.2 Motion of a Bloch domain wall

6.4.3 Magnetostatics and the magnetization process. Pre-existing domain walls

6.5 Appendix 6A: Vortex solutions in cylinder and disc: stability considerations

References

Subject Index

A

B

C

D

E

F

G

H

I

K

L

M

N

P

R

S

T

V

W

Z.

Notes:

Includes bibliographical references (p. 185-188) and index.

Description based on metadata supplied by the publisher and other sources.

Description based on publisher supplied metadata and other sources.

ISBN:

9786611160142

9780191523670

0191523674

9780191713545

0191713546

9781281160140

1281160148

9781435620797

1435620798

OCLC:

476244396