FERROMAGNETS WITH RANDOM ANISOTROPY - LONGITUDINAL SPIN-RESONANCE AND MOVABLE ANISOTROPY
Academic Article
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
Random anisotropy in ferromagnets causes small reorientations of the spins, so that they are not precisely collincar. As a consequence, an anisotropy torque develops for rotations about any axis. This requires the introduction of both a new macroscopic spin variable (to represent the macroscopic orientation about the magnetization) and an anisotropy triad. The macroscopic dynamics, including the dissipative motion of the anisotropy triad, is obtained, and a number of applications are considered. Most striking is the prediction of a longitudinal spin resonance mode. 1983 The American Physical Society.