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      https://www.ias.ac.in/article/fulltext/boms/043/0208

    • Keywords

       

      Reduced graphene oxide; reduced graphene oxide–polymer nanocomposites; dielectric properties; magnetodielectric effects.

    • Abstract

       

      Three polymers, poly(vinyl alcohol) (PVA), poly(acrylic acid) (PAA) and poly(methyl methacrylate) (PMMA), are used as matrices to synthesize three nanocomposites each with reduced graphene oxide (RGO) fillers (5 wt%). The dielectric properties of these nanocomposites, RGO–PVA, RGO–PAA and RGO–PMMA, are studied in zero magnetic field and in magnetic field ($H$) up to 1.2 T. From these data magnetodielectric effects are obtained as the variation of $\epsilon^{\prime}$ and $\epsilon^{\prime\prime}$—the real and imaginary parts of complex dielectric constant with $H$ at some frequencies. Thus at 100 kHz for the increase of $H$ from zero to 1 T $\epsilon^{\prime}$ decreases by 5% in RGO–PVA and by 4% in RGO–PAA, whereas $\epsilon^{\prime}$ increases by 4% in RGO–PMMA. The observed magnetodielectric effects, though small, are significant. They show both decrease and increase of $\epsilon^{\prime}$ depending on the polymer. This fact is the indicative of the interaction between RGO filler particles and polymer chains.

    • Author Affiliations

       

      S S PRADHAN1 T N GHOSH2 A MARIK1 K K RAUL1 S K SARKAR1

      1. Department of Physics, Midnapore College (Autonomous), Midnapore 721101, India
      2. Department of Electronics, Midnapore College (Autonomous), Midnapore 721101, India
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