1Assistant Professor, Department of Physics, Guru Nanak Dev Engineering College, Bidar-585403, Karnataka, India
2Associate Professor, Department of Physics, Bheemanna Khandre Institute of Technology, Bhalki-585328, Karnataka, India
3Associate Professor, Department of Physics, Guru Nanak Dev Engineering College, Bidar-585403, Karnataka, India
4Assistant Professor, Department of Chemistry, Guru Nanak Dev Engineering College, Bidar-585403, Karnataka, India
Online published on 8 May, 2017.
Conducting polyaniline/Nickel ferrite (PANI/NiFe2O4) nanocomposites have been synthesized by an interfacial polymerization using ammonium persulphate as the oxidant, with different weight percentage (10, 30 and 50 wt %) of NiFe2O4 in PANI whereas NiFe2O4 nanoparticles have been synthesized by microwave method. The samples were characterized by Fourier Transform infrared (FTIR) spectroscopy, structures and morphology of samples were studied by X-Ray Diffraction (XRD), Scanning Electron Microscopy and Transmission Electron Microscopy (TEM) indicates the dispersion of NiFe2O4 in PANI. The AC conductivity, Dielectric constant and Dielectric loss of these samples were investigated as a function of frequency at room temperature in the frequency range 10 Hz to 106 Hz. The AC conductivity of 7.58x10−6 Scm−1 at 6x105 Hz due to dipole polarization at room temperature is observed as the maxima for the PANI/NiFe2O4 (30wt %) nanocomposites. The real dielectric constant and imaginary dielectric constant decreased as the frequency increased and after 104 Hz they remain almost constant. The magnetic properties of the samples were measured at room temperature using Vibrating Sample Magnetometer (VSM) in the field range ±15000G.
Conductivity, Polyaniline, Nickel ferrite, Nanocomposites, Dielectric constant
