Magnetodielectric effect of Graphene-PVA Nanocomposites

Graphene-Polyvinyl alcohol (PVA) nanocomposite films with thickness \(120 \mu m\) 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 graph...

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Bibliographic Details
Published in:arXiv.org 2012-05
Main Authors: Mitra, Sreemanta, Mondal, Oindrila, Saha, Dhriti ranjan, Datta, Anindya, Banerjee, Sourish, Chakravorty, Dipankar
Format: Article
Language:English
Subjects:
Dielectric relaxation
Dielectrics
Electric power generation
Electrical resistivity
Graphene
Nanocomposites
Nanogenerators
Permittivity
Polyvinyl alcohol
Solidification
Thickness
Two dimensional models
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Summary:Graphene-Polyvinyl alcohol (PVA) nanocomposite films with thickness \(120 \mu m\) 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1205.0384