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Analysing dielectric dispersion of 0.64PMN–0.36PT ceramics using electrical conductivity

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Abstract

A new approach of using AC conductivity as function of frequency and temperature has been proposed for analysing ferroelectric ceramic materials, especially those having Debye-type dielectric dispersion. A theoretical model for the AC conductivity has been validated with the measurements performed on 0.64PMN–0.36PT ceramic material. It has been found that the slope of the conductivity vs. frequency curve of the material having Debye-type dielectric dispersion shows a significant change at a certain frequency, called knee frequency, which shifts towards the high-frequency side when the temperature is increased. The signature parameters of the electrical conductivity curve have been identified that can be used for a quick estimate of the dielectric dispersion behaviour of the material. The difference in the slope of the two regions, separated by the knee frequency, is found to have a strong correlation with the relaxation time distribution factor.

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Acknowledgement

We thank Dr Abid Hussain, Assistant Professor, ARSD College, University of Delhi, for providing the measurement data. We are also grateful to the Principal of Hindu College, Principal of Hansraj College, University of Delhi, and Director SSPL, Delhi, for their support and encouragement to carry out this work and publish it.

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Authors and Affiliations

  1. Hindu College, University of Delhi, Delhi, 110007, India

    Aparna Saxena

  2. Hansraj College, University of Delhi, Delhi, 110007, India

    Anjali Saxena

  3. Solid State Physics Laboratory, Delhi, 110054, India

    Raghvendra Sahai Saxena

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  1. Aparna Saxena
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  2. Anjali Saxena
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  3. Raghvendra Sahai Saxena
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Correspondence to Raghvendra Sahai Saxena.

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Saxena, A., Saxena, A. & Saxena, R.S. Analysing dielectric dispersion of 0.64PMN–0.36PT ceramics using electrical conductivity. Bull Mater Sci 46, 124 (2023). https://doi.org/10.1007/s12034-023-02965-9

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  • DOI: https://doi.org/10.1007/s12034-023-02965-9

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