A simulation of rotation magnetization processes in longitudinal thin-film media

Author

Yang, Wei ; Lambeth, David N.

Author_Institution

Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

2965

Lastpage

2967

Abstract

The effect of the local demagnetizing field on the rotation magnetization processes in Co-based alloy longitudinal thin-film media was studied as a simple approach to understanding the correlation between the medium coercivity and the strength of the in-plane easy axis crystallographic texture. The rotation magnetization of a single domain particle with uniaxial anisotropy in a thin film was simulated without and with the effect of a uniform local demagnetizing field. Longitudinal thin-film media were then modeled as assemblies of non-interacting single domain particles with various easy axis distributions, and the demagnetizing field was found to decrease the in-plane coercivity as the easy axes of an increasing fraction of the grains are tilted out of the film plane. The rotational hysteresis remains a valid method of measuring the anisotropy field after considering the demagnetizing effect

Keywords

cobalt alloys; coercive force; demagnetisation; ferromagnetic materials; magnetic anisotropy; magnetic domains; magnetic hysteresis; magnetic particles; magnetic recording; magnetic thin films; texture; easy axis distributions; in-plane easy axis crystallographic texture; local demagnetizing field; longitudinal thin-film media; medium coercivity; rotation magnetization processes; rotational hysteresis; single domain particle; uniaxial anisotropy; Anisotropic magnetoresistance; Assembly; Coercive force; Crystallography; Demagnetization; Hysteresis; Magnetic field measurement; Magnetization processes; Rotation measurement; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617812

Filename

617812