Exact calculation method for medium field from a perpendicular medium

Author

Suzuki, Yoshio ; Nishida, Yasutaka

Author_Institution

Central Res. Lab., Hitachi Ltd., Tokyo, Japan

Volume

39

Issue

5

fYear

2003

Firstpage

2633

Lastpage

2635

Abstract

An exact calculation method for the medium field from a perpendicular magnetic recording medium with a soft underlayer was derived. The new method utilizes the Fourier series expansion, and the derived equation converges to the equation for the medium without a soft underlayer in the limit of infinite distance between the head surface and the soft underlayer. The new method, when combined with a micromagnetics simulation of the medium and the giant magnetoresistive head, provides a useful tool for the analysis of the read back signals in perpendicular magnetic recording.

Keywords

Fourier series; giant magnetoresistance; magnetic heads; micromagnetics; perpendicular magnetic recording; Fourier series expansion; exact calculation method; giant magnetoresistive head; micromagnetics simulation; perpendicular magnetic recording; read back signals; Equations; Giant magnetoresistance; Magnetic analysis; Magnetic heads; Magnetic recording; Magnetic separation; Magnetic shielding; Micromagnetics; Perpendicular magnetic recording; Soft magnetic materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.815534

Filename

1233167