Theory of the magnetic damping constant

Author

Suhl, Harry

Author_Institution

Dept. of Phys., California Univ., San Diego, La Jolla, CA, USA

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1834

Lastpage

1838

Abstract

The aim of this paper is to express the effects of basic dissipative mechanisms involved in the dynamics of the magnetization field in terms of the one most commonly observed quantity: the spatial average of that field. The mechanisms may be roughly divided into direct relaxation to the lattice, and indirect relaxation via excitation of many magnetic modes. Two illustrative examples of these categories are treated; direct relaxation via magnetostriction into a lattice of known elastic constant, and relaxation into synchronous spin waves brought about by imperfections. Finally, a somewhat speculative account is presented of time constants to be expected in magnetization reversal

Keywords

elastic constants; magnetic relaxation; magnetisation reversal; magnetostriction; spin waves; direct relaxation; dissipative mechanisms; elastic constant; indirect relaxation; magnetic damping constant; magnetization reversal; magnetostriction; synchronous spin waves; time constants; Couplings; Damping; Equations; Lattices; Magnetic domain walls; Magnetic domains; Magnetic field induced strain; Magnetoelasticity; Stress; Viscosity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706720

Filename

706720