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An analytical model for the ΔE effect in magnetic materials

Published online by Cambridge University Press:  06 February 2009

L. Daniel  and
O. Hubert
L. Daniel*
Affiliation:
LGEP, CNRS-UMR 8507, Supélec, Univ. Paris-Sud, UPMC Paris 6, Plateau de Moulon, 11 rue Joliot-Curie, 91192 Gif-sur-Yvette Cedex, France
O. Hubert
Affiliation:
LMT-Cachan – ENS Cachan, CNRS-UMR 8535, UPMC Paris 6, 61 avenue du Président Wilson, 94235 Cachan Cedex, France
*
laurent.daniel@lgep.supelec.fr
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Abstract

The ΔE effect is often presented as the dependency of the Young's modulus of a material on its state of magnetization. Nevertheless, the elastic properties of a magnetic material do not depend on the magnetization state. Actually, the sensitivity of the magnetostriction strain to the application of a stress explains the ΔE effect. According to this statement, a semi-analytical model for the ΔE effect is proposed, in which magnetization rotation is not considered. An experimental procedure to measure the ΔE effect in magnetic materials is then built-up. Experimental and modeling results are finally compared, with satisfying agreement.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 45 , Issue 3 , March 2009 , 31101
Copyright
© EDP Sciences, 2009

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