Calculation method of GMR head response for double layered perpendicular medium

Author

Suzuki, Yoshio ; Nishida, Yasutaka

Author_Institution

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

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1337

Lastpage

1339

Abstract

A new field calculation method was developed for the reading process that involves a double-layered medium with a soft underlayer. The image fields due to both the underlayer and the ABS have to be taken into consideration. It was found that the field can be expressed in an equation similar to that describing multiple reflection of light in an optical multilayer, except that the scalar terms in the optical system have to be replaced with tensor terms with Fourier components as bases. This field, in turn, may be used as an input to a micromagnetic simulation model for GMR head to give the reproduced signal

Keywords

Fourier analysis; giant magnetoresistance; magnetic heads; magnetoresistive devices; perpendicular magnetic recording; ABS; Fourier tensor; double layered perpendicular magnetic recording medium; giant magnetoresistive head; image field; micromagnetic simulation model; multiple reflections; reading process; soft underlayer; Equations; Magnetic heads; Magnetic recording; Micromagnetics; Optical devices; Optical recording; Optical reflection; Optical superlattices; Perpendicular magnetic recording; Tensile stress;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950834

Filename

950834