Effective Switching Field Distribution Evaluation Using Saturation Field in Minor Loop*

Author

Hinata, Shintaro ; Saito, Shin ; Itagaki, Norikazu ; Takahashi, Migaku

Author_Institution

Dept. of Electron. Eng., Tohoku Univ., Sendai, Japan

Volume

48

Issue

3

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

1248

Lastpage

1251

Abstract

A new method for evaluating the switching field distribution (SFD) in perpendicular magnetic recording media is proposed using the saturation magnetic field of a minor loop, H_s^minor. In this method, the switching fields of focused reversal magnetic grains are measured with all magnetic moments in other domains saturated in the upward direction. Thus, the proposed SFD evaluation is not affected by variety of domain structure, and reveals tails of distribution. Using the proposed method, the SFD for various granular media was evaluated.

Keywords

granular materials; magnetic domains; magnetic moments; magnetic switching; magnetisation reversal; perpendicular magnetic recording; focused reversal magnetic grains; granular media; magnetic domain structure; magnetic moments; minor loop; perpendicular magnetic recording media; saturation magnetic field; switching field distribution; Magnetic domains; Magnetic hysteresis; Media; Perpendicular magnetic anisotropy; Saturation magnetization; Switches; Magnetic films; magnetic hysteresis; perpendicular recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2187129

Filename

6158745