The investigation of the electrical transport properties of Gd doped YCrO 3 nanoparticles

Abstract We report the electrical transport properties of Gd doped YCrO 3 nanoparticles synthesized by sol-gel method in the temperature range 298–523 K and in the frequency range 100 Hz–1 MHz. Samples are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Uv–vis absorption spectroscopy. The real and imaginary parts of the dielectric permittivity are followed by Cole-Cole model including electrical conductivity contribution. It is observed that the values for the space charge conductivity and free charge conductivity increase with temperature and the relaxation time decreases with the increase of temperature. The variation of imaginary part of complex electric modulus with frequency at different temperatures shows well defined peaks and considering generalized susceptibility function its asymmetric nature and non – Debye type behavior have been analyzed. The DC and AC activation energy increases with the increase of doping concentration. DC transport properties are analyzed following adiabatic small polaron model.