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Impedance, scaling behavior and conduction mechanism in double perovskite Pr2CuZrO6 ceramic

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Abstract

Double perovskite oxide Pr2CuZrO6 (PCZO) has been synthesized by solid-state reaction technique in the temperature range from 30 to 310 °C and in the temperature range from 100 Hz to 1 MHz. The X-ray diffraction pattern of the sample at room temperature shows monoclinic structure. An analysis of the real and imaginary parts of impedance as well as electric modulus shows a distribution of relaxation times. The Cole–Cole model is used to investigate the relaxation mechanism of PCZO. The frequency-dependent maxima in the imaginary impedance and imaginary electric modulus are found to obey an Arrhenius law with activation energy ~0.35 eV. The frequency-dependent electrical data is also analyzed in the framework of conductivity. The combined Z″/Z″m and M″/M″m plots indicates that the charge carriers are localized in PCZO in the higher temperature range. The ac conductivity spectra follow the universal power law and Summerfield scaling.

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Acknowledgments

Sujoy Saha acknowledges the financial support provided by the UGC New Delhi in the form of SRF.

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Authors and Affiliations

  1. Department of Physics, National Institute of Technology Patna, Patna, 800 005, India

    Dev K. Mahato

  2. Department of Physics, Bose Institute, 93/1, Acharya Prafulla Chandra Road, Kolkata, 700009, India

    Sujoy Saha & T. P. Sinha

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  1. Dev K. Mahato
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  2. Sujoy Saha
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  3. T. P. Sinha
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Correspondence to Dev K. Mahato.

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Mahato, D.K., Saha, S. & Sinha, T.P. Impedance, scaling behavior and conduction mechanism in double perovskite Pr2CuZrO6 ceramic. J Mater Sci: Mater Electron 27, 3845–3853 (2016). https://doi.org/10.1007/s10854-015-4232-4

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  • DOI: https://doi.org/10.1007/s10854-015-4232-4

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