MR reader sensitivity and SAL magnetic anisotropy

Author

Shen, J.X. ; Xie, Chang ; Ding, Juren ; Shultz, Allan ; Liao, Simon H.

Author_Institution

Seagate Recording Heads, Bloomington, MN, USA

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2595

Lastpage

2597

Abstract

Two kinds of abutted junction magnetoresistive recording heads with different SAL effective magnetic anisotropy were manufactured. Experimental results show that heads with near zero magnetostriction have stable performance. However, heads with very positive (10^-6) magnetostriction show multi-domain state, bumpy microtracks. The amplitude of this head with highly magnetostrictive SAL depends on the initial SAL magnetic state with respect to the bias current. All these abnormalities are mainly caused by the effective magnetic anisotropy of the SAL being perpendicular instead of parallel to the ABS of the SAL layer

Keywords

magnetic anisotropy; magnetic heads; magnetoresistive devices; magnetostriction; ABS; abutted junction magnetoresistive recording head; magnetic anisotropy; magnetostriction; microtrack profile; multi-domain state; reader sensitivity; soft adjacent layer; Magnetic anisotropy; Magnetic fields; Magnetic films; Magnetic force microscopy; Magnetic heads; Magnetostriction; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Switches;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800901

Filename

800901