The role of Cr/Co substitution on dielectric properties of gadolinium orthochromite

Abstract

The dielectric relaxation of GdCr1−xCoxO3 (x = 0, 0.33, 0.5 and 1) was studied using dielectric spectroscopy. The study was performed in a frequency range from 10 Hz to 10 MHz and a temperature interval of 297 K–337 K. Changes in dielectric constant and electric modulus with increasing Cr/Co substitution in the structures were observed. The obtained results of dielectric loss were analyzed introducing the model of a hopping of charge carrier over a potential barrier between charged defects. The conduction mechanism for pure and mixed structures was discussed in detail.