Synthesis and electric characterization of rare earth double perovskite Ho2CdZrO6 ceramicsReport as inadecuate




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Journal of Electroceramics

, Volume 29, Issue 2, pp 99–105

First Online: 13 July 2012Received: 30 December 2011Accepted: 22 June 2012

Abstract

A new double perovskite oxide holmium cadmium zirconate Ho2CdZrO6 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 T law indicating 3D charge transport in HCZ compound. High temperature data indicates the formation of thermally activated small polarons.

KeywordsChemical synthesis Double perovskite Electrical properties  Download fulltext PDF



Author: Dev K. Mahato - A. Dutta - T. P. Sinha

Source: https://link.springer.com/







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