Dielectric spectroscopy of polypyrrole–γ–Fe2O3 composites

In situ polymerization of pyrrole was carried out in the presence of γ–Fe2O3 (FE) to synthesize polypyrrole–γ–Fe2O3 composites (PPy/FE) by chemical oxidation method. The PPy/FE composites have been synthesized with various compositions viz., 10, 20, 30, 40 and 50 wt.% of γ–Fe2O3 in pyrrole. The AC conductivity was studied in the frequency range 102–107 Hz. The dielectric behaviour was also investigated in the frequency range 102–107 Hz. The dimensions of γ–Fe2O3 particles in the matrix have a greater influence on the conductivity values and the observed dielectric values.