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Issue 47, 2013
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Strong magnetodielectric effects in magnetorheological elastomers

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Abstract

The effect of a uniform magnetic field on the permittivity of magnetorheological elastomers (MREs) is studied. MREs were synthesized on the basis of silicone rubber and magnetic fillers of various chemical nature (Fe, NdFeB and Fe3O4) and particle sizes. The value of permittivity was obtained from the measurements of the capacity of a plane capacitor with MRE samples. A strong increase of the permittivity (magnetodielectric effect) was observed when the applied field was perpendicular to the capacitor plates. The value of the magnetodielectric effect was found to be strongly dependent on the type of magnetic filler as well as on the size and concentration of magnetic particles within MRE composites. The highest magnetic response reaching 150% was observed for the MRE based on a magnetically hard NdFeB filler. A simple model explaining physical reasons for the magnetodielectric effect in a MRE is proposed. The developed MRE with a strong magnetodielectric effect is very promising for a wide range of applications, in particular, as magnetic field sensors and actuators.

Graphical abstract: Strong magnetodielectric effects in magnetorheological elastomers

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Publication details

The article was received on 14 Jun 2013, accepted on 09 Oct 2013 and first published on 10 Oct 2013


Article type: Paper
DOI: 10.1039/C3SM52523F
Citation: Soft Matter, 2013,9, 11318-11324
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    Strong magnetodielectric effects in magnetorheological elastomers

    A. S. Semisalova, N. S. Perov, G. V. Stepanov, E. Yu. Kramarenko and A. R. Khokhlov, Soft Matter, 2013, 9, 11318
    DOI: 10.1039/C3SM52523F

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