Eur. Phys. J. Appl. Phys.
Volume 45, Number 3, March 2009
|Number of page(s)||11|
|Section||Physics of Energy Generation, Conversion and Storage|
|Published online||06 February 2009|
An analytical model for the ΔE effect in magnetic materials
LGEP, CNRS-UMR 8507, Supélec, Univ. Paris-Sud, UPMC Paris 6,
Plateau de Moulon, 11 rue Joliot-Curie, 91192 Gif-sur-Yvette Cedex, France
2 LMT-Cachan – ENS Cachan, CNRS-UMR 8535, UPMC Paris 6, 61 avenue du Président Wilson, 94235 Cachan Cedex, France
Corresponding author: email@example.com
Revised: 16 December 2008
Accepted: 22 December 2008
Published online: 6 February 2009
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.
PACS: 75.80.+q – Magnetomechanical and magnetoelectric effects, magnetostriction / 46.25.Hf – Thermoelasticity and electromagnetic elasticity
© EDP Sciences, 2009
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