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A new double perovskite oxide holmium cadmium zirconate HoCdZrO (HCZ) is synthesized by solid state reaction technique. The crystal structure has been determined by powder X-ray diffraction (XRD) which shows monoclinic phase at room temperature. The frequency dependent electrical data are analyzed in the framework of conductivity and electric modulus formalisms. The scaling behavior of imaginary electric modulus suggests that the relaxation describe the same mechanism at various temperatures. Nyquist plots are drawn to identify an equivalent circuit and to know the bulk and interface contributions. The conduction mechanism is explained by Mott’s theory. At the high temperature range, conductivity data satisfy the variable range hopping (VRH) model. In this regime, the conductivity of sample obeys Mott’s   law indicating 3D charge transport in HCZ compound. High temperature data indicates the formation of thermally activated small polarons.

Synthesis and electric characterization of rare earth double perovskite Ho2CdZrO6 ceramics