Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816167
