Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 322, Issue 21, Pages 3337-3341Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2010.06.020
Keywords
Shape effect; Ferromagnetic particle; Elastomer; Demagnetizing field; Filling factor; Composite Young's modulus
Funding
- Region Rhone-Alpes (France) through the cluster MACODEV (MAteriaux et COnception pour un DEVeloppement durable)
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The magnetostriction of composite consisting of a soft matrix, non-magnetic, randomly filled by ferromagnetic particles is measured. The measured elongation on cylinder-shaped samples displays shape dependence. A model based on the demagnetizing field and the effective Youngs modulus is provided. Both calculation and measurement show a positive magnetostriction with larger values as the samples are flatter. The model is derived to have the behavior of the elongation as a function of the filling factor. An expression of the optimal filling factor, providing a maximal strain, is also expressed. (C) 2010 Elsevier B.V. All rights reserved.
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