Accession Number : AD0774273

Title :   Thermally Activated Domain Wall Motion,

Corporate Author : MANITOBA UNIV WINNIPEG DEPT OF PHYSICS

Personal Author(s) : Gaunt,P.

Report Date : 30 APR 1973

Pagination or Media Count : 4

Abstract : A theory of thermally activated domain wall motion is presented in which attention is focused on the functional form of the domain wall energy variation in the direction of motion. It is shown that in general the activation volume is magnetic field dependent, and not necessarily constant, as is often assumed. A simple power law form of the wall energy variation, due to sample inhomogeneities, is found to exhibit a wall velocity against field slope which decreases with decreasing temperature as is observed in thin films. The usual assumption of a constant activation volume predicts a slope which increases as the temperature falls. (Author)

Descriptors :   *Magnetic domains, *Domain walls, Equations of motion, Magnetic fields, Canada

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE