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arXiv · 1205.0384

Magnetodielectric effect of Graphene-PVA Nanocomposites

Sreemanta Mitra·Oindrila Mondal·Dhriti ranjan Saha·Anindya Datta·Sourish Banerjee·Dipankar Chakravorty
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Abstract

Graphene-Polyvinyl alcohol (PVA) nanocomposite films with thickness $120 μm$ were synthesized by solidification of PVA in a solution with dispersed graphene nanosheets. Electrical conductivity data were explained as arising due to hopping of carriers between localized states formed at the graphene-PVA interface. Dielectric permittivity data as a function of frequency indicated the occurrence of Debye-type relaxation mechanism. The nanocomposites showed a magnetodielectric effect with the dielectric constant changing by 1.8% as the magnetic field was increased to 1 Tesla. The effect was explained as arising due to Maxwell-Wagner polarization as applied to an inhomogeneous two-dimensional,two-component composite model. This type of nanocomposite may be suitable for applications involving nanogenerators.

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Sreemanta Mitra, Oindrila Mondal, Dhriti ranjan Saha, Anindya Datta, Sourish Banerjee, Dipankar Chakravorty. 2012-05-02. Magnetodielectric effect of Graphene-PVA Nanocomposites. https://doi.org/10.1021/jp203724f

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