Domain reversal simulation for anisotropy-energy fluctuation

Author

Choe, Sug-Bong ; Shin, Sung-Chul

Author_Institution

Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3167

Lastpage

3169

Abstract

Influence of a nonuniform anisotropy distribution on domain reversal dynamics in ferromagnetic thin films has been investigated. A micromagnetic model has been developed adopting a Monte Carlo algorithm to examine the thermally activated reversal process. In this study, the uniaxial magnetic anisotropy magnitude is spatially nonuniform. Interestingly, the simulation results demonstrate the crucial importance of the nonuniform anisotropy variation on the domain reversal dynamics. The reversal behavior is altered from wall-motion dominant to nucleation dominant with a small change in the spatial anisotropy distribution

Keywords

Monte Carlo methods; ferromagnetism; magnetic anisotropy; magnetic domains; magnetic thin films; Monte Carlo simulation; anisotropy-energy fluctuations; domain reversal dynamics; ferromagnetic thin film; micromagnetic model; spatial anisotropy distribution; uniaxial magnetic anisotropy; Anisotropic magnetoresistance; Fluctuations; Magnetic anisotropy; Magnetic domains; Magnetic films; Magnetostatics; Micromagnetics; Perpendicular magnetic anisotropy; Saturation magnetization; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908724

Filename

908724