Highly field-sensitive transverse-biased non-hysteretic spin valves

Author

Fujiwara, Hideo ; Hou, Chun-Hong ; Nishioka, Koichi

Author_Institution

Center for Mater. for Inf. Tech., Alabama Univ., Tuscaloosa, AL, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4603

Lastpage

4605

Abstract

Transverse biasing effect on spin valves was studied by use of a uniform rotation model. The effect was proved to be substantial in improving non-hysteretic spin valves in the field sensitivity, although the dynamic range was sacrificed to some extent. An experimental test showed that compared with the conventional spin valve in which the pinning field direction is set perpendicular to the easy axis of the free layer, 2.5 times sensitivity was obtained with a dynamic range of 0.6 times compared to that of the ideal conventional case. Calculation showed that a self-biasing effect by tilting the pinning field direction of the pinned layer from the easy axis of the soft magnetic layer was also effective in enhancing the field sensitivity

Keywords

giant magnetoresistance; magnetic heads; magnetic multilayers; magnetoresistive devices; soft magnetic materials; dynamic range; field sensitivity; high-density magnetic recording; magnetic heads; pinning field direction; self-biasing effect; soft magnetic layer; transverse-biased nonhysteretic spin valves; uniform rotation model; Anisotropic magnetoresistance; Antiferromagnetic materials; Dynamic range; Giant magnetoresistance; Magnetic anisotropy; Magnetization; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Soft magnetic materials; Spin valves;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539092

Filename

539092