Electrical conductivity and dielectric relaxation in Pr2CoZrO6 double perovskite

Figure shows complex impedance spectrum of Pr2CoZrO6 at various temperatures. Solid line is the fitting to the experimental data by RC equivalent circuit. In the impedance spectrum, only single semicircular arcs (hollow curves) are observed at all temperatures with nonzero intercept at high frequencies indicate that the sample is electrical inhomogeneous. Single semicircular arcs observed in the complex impedance plane at lower frequencies reveal that the conduction in the material is predominant in grain boundary.