High-speed coherent switching in fine grains

Author

Lyberatos, A. ; Khizroev, S. ; Litvinov, D.

Author_Institution

Seagate Res., Pittsburgh, PA, USA

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1369

Lastpage

1372

Abstract

The effect of the relative head-to-medium velocity on the switching dynamics of individual grains is studied using the Landau-Lifshitz-Gilbert equation of motion. The coercive field of a grain may increase or decrease with velocity depending on the direction of crystal anisotropy. An asymmetry is present and the coercivity of an ensemble of grains with random in-plane anisotropy is found to increase, in agreement with measurements on a CoCr longitudinal magnetic recording medium

Keywords

coercive force; magnetic anisotropy; magnetic particles; magnetic recording; magnetic switching; magnetisation reversal; CoCr; CoCr longitudinal magnetic recording medium; Landau-Lifshitz-Gilbert equation of motion; coercive field; fine grains; high-speed coherent switching dynamics; magnetization reversal; micromagnetic model; random in-plane anisotropy; relative head-to-medium velocity; single domain particle; Anisotropic magnetoresistance; Equations; Magnetic anisotropy; Magnetic field measurement; Magnetic heads; Magnetic recording; Magnetic switching; Perpendicular magnetic anisotropy; Saturation magnetization; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950844

Filename

950844