Scaling of Static and Dynamical Properties of Random Anisotropy Magnets

Abstract

Recently observed scaling in the random-anisotropy model of amorphous or sintered ferromagnets is derived by an alternative method and extended for studying the dynamical properties in terms of the Landau-Lifshitz equations for spin blocks. Switching to the rescaled exchange and anisotropy constants allows one to investigate the dynamics by using a reduced number of variables, which greatly speeds up computations. The proposed dynamical scaling is applied to the problem of microwave absorption by a random anisotropy magnet. The equivalence of the rescaled model to the original atomic model is confirmed numerically. The method is proposed as a powerful tool in studying static and dynamic properties of systems with quenched randomness.

7 pages, 3 figure captions (5 figures)

References in corpus (3)

• Absorption of Microwaves by Random-Anisotropy Magnets
• Nonlinear and Thermal Effects in the Absorption of Microwaves by Random Magnets
• Integral Absorption of Microwave Power by Random-Anisotropy Magnets

Cited by in corpus (3)

• Static and Microwave Properties of Amorphous Magnets Near Saturation
• Energy minima and ordering in ferromagnets with quenched randomness
• Inter-Event Time Power Laws in Heterogeneous Systems