Weakly coupled GMR sandwiches

Author

Daughton, James M.

Author_Institution

Nonvolatile Electronics Inc., Plymouth, MN, USA

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

364

Lastpage

368

Abstract

Thin film structures comprised of two magnetic films sandwiching a nonmagnetic conductor can have magnetoresistance several times larger than conventional anisotropic magnetoresistance materials. If the coupling between magnetizations in the two films is sufficiently small (either parallel or antiparallel), the saturation magnetic field can be sufficiently small for improved read heads. Magnetoresistances, coupling fields, sheet resistivities, current density effects, thermal limits, and magnetostrictions of these structures are described. No fundamental restrictions are found for using these sandwiches in magnetic head applications

Keywords

current density; magnetic heads; magnetic thin film devices; magnetoresistance; magnetoresistive devices; antiparallel; coupling fields; current density effects; giant magnetoresistance ratio; magnetic films; magnetic head applications; magnetoresistance; magnetostrictions; nonmagnetic conductor; parallel; read heads; saturation magnetic field; sheet resistivities; thermal limits; thin film structures; weakly coupled GMR sandwiches; Anisotropic magnetoresistance; Conducting materials; Couplings; Giant magnetoresistance; Magnetic anisotropy; Magnetic films; Magnetic materials; Magnetostriction; Perpendicular magnetic anisotropy; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312288

Filename

312288