Study of Magnetic and Electrical Properties of Poly(o-phenylenediamine)/Manganese Substituted ZnFe2O4 Nanocomposites

Different concentrations of ZnFe 2 O 4 and manganese substituted ZnFe 2 O 4 nanoparticles (10%, 20% and 30%) dispersed poly( o -phenylenediamine) (PoPD)/ferrite nanocomposites have been prepared by in-situ oxidative polymerization method. The synthesized nanocomposites have been characterized by spectroscopic, microscopic techniques, thermal and dielectric properties analyzed at different temperature and frequency. The XRD pattern revealed that there is a good interaction between PoPD and ferrite nanoparticles. The crystalline size of ferrite nanoparticles are changed when it is dispersed in PoPD. The morphology of PoPD is modified by ZnFe 2 O 4 nanoparticles into sheet like morphology. The Mössbauer spectra of ferrite nanoparticles are indicated that iron present in Fe 3+ high spin state. The magnetic studies of ferrite nanoparticles and PoPD/ferrite nanocomposites are exhibited ferromagnetic magnetic nature and saturation magnetization of PoPD/ferrite nanocomposites increases with increase concentration of nanoparticles. The PoPD/ZnFe 2 O 4 has higher dielectric constant than PoPD/MnZnFe 2 O 4 . The AC conductivity of PoPD/ferrite nanocomposites are increased with increasing in frequency and temperature.