Control of asymmetry of spin valve heads based on micromagnetic analysis

Author

Yamada, Ken-ichiro ; Kanai, Hitoshi ; Uehara, Yuji ; Toda, Junzo

Author_Institution

File Memory Lab., Fujitsu Labs. Ltd., Kanagawa, Japan

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1447

Lastpage

1449

Abstract

Relationship between the asymmetry of spin-valve heads and various parameters is revealed by systematical investigations of a micromagnetic analysis. We design spin-valve heads with a good asymmetry by canting the pinned layer. However, for spin-valve heads for high density recording over 10 Gb/in², a poor asymmetry caused by the degeneration of the magnetization direction of the free layer becomes a serious problem. To solve this problem, we introduce a bias compensation layer (BCL) to the spin-valve structure. We prove that BCL is very effective in controlling the asymmetry

Keywords

magnetic heads; magnetic multilayers; magnetisation; magnetoresistive devices; asymmetry; bias compensation layer; canting; free layer; high density recording; magnetization direction; micromagnetic analysis; pinned layer; spin valve heads; spin-valve structure; Anisotropic magnetoresistance; Conductive films; Laboratories; Magnetic analysis; Magnetic anisotropy; Magnetic heads; Magnetic moments; Magnetization; Micromagnetics; Perpendicular magnetic anisotropy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706578

Filename

706578