Computer simulation of hybrid medium for perpendicular magnetic recording

Author

Yoshida, K. ; Hirayama, Y. ; Futamoto, M.

Author_Institution

Kogakuin Univ., Tokyo, Japan

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1589

Lastpage

1591

Abstract

In perpendicular magnetic recording decrease in recording medium noise is one of the most important issues for practical use. One solution is to use a medium with a high squareness. However, such a medium has strong exchange coupling, which results in the increase in medium noise at high recording density. To solve the contradiction we propose a hybrid medium that is composed of two layers, one has strong exchange interaction and the other is an isolated medium. With computer simulation we investigated the read/write characteristics of a hybrid medium. It was found that recording magnetizations of a hybrid medium is kept saturated over 800 kFCI and shows excellent signal-to-noise ratio

Keywords

exchange interactions (electron); magnetic recording noise; magnetisation; perpendicular magnetic recording; computer simulation; exchange interaction; high recording density; hybrid medium; perpendicular magnetic recording; read/write characteristics; recording magnetizations; recording medium noise; signal-to-noise ratio; strong exchange coupling; Computer simulation; Couplings; Elementary particle exchange interactions; Magnetic domains; Magnetic films; Magnetic noise; Magnetic recording; Magnetooptic recording; Perpendicular magnetic recording; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950909

Filename

950909