Strain-induced resistance changes in CoFe/Cu GMR multilayers

Author

Florez, Sylvia H. ; Gomez, R.D.

Author_Institution

Coll. Park, Univ. of Maryland, College Park, MD, USA

Volume

39

Issue

5

fYear

2003

Firstpage

3411

Lastpage

3413

Abstract

We study the elastoresistance of CoFe/Cu antiferromagnetically coupled giant magnetoresistive films. This refers to variations in resistivity due to strain-induced changes in magnetization. This type of phenomenon, observed on a multilayer, originates mainly from the inverse magnetostriction effect, taking place within the magnetic layers. Since these magnetizations are coupled, strain induces an overall effect on the film resistivity. Our measurements reveal that these effects lead to enhanced strain sensitivity in comparison to films made of the materials the materials that compose the multilayer.

Keywords

cobalt alloys; copper; exchange interactions (electron); giant magnetoresistance; iron alloys; magnetic multilayers; magnetisation; magnetoelastic effects; magnetostriction; CoFe-Cu; CoFe/Cu GMR multilayers; CoFe/Cu antiferromagnetically coupled giant magnetoresistive films; coupled magnetizations; elastoresistance; enhanced strain sensitivity; inverse magnetostriction effect; magnetic layers; magnetization; resistivity; strain-induced resistance changes; Conductivity; Couplings; Giant magnetoresistance; Magnetic field induced strain; Magnetic films; Magnetic multilayers; Magnetization; Magnetostriction; Nonhomogeneous media; Strain measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.816167

Filename

1233413