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Structural, dielectric and electrical properties of Te modified barium stannates using impedance analysis

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Abstract

Te modified barium stannates BaSn1−xTexO3 (x = 0–15 mol%) provides an interesting result (i.e., ferroelectric phase transition) above room temperature. As we increase concentration of Te, dielectric anomalies (dielectric constant and loss) increases but Curie temperature (T c) shifted towards lower temperature side. Impedance analysis indicates the existence of both grain and grain boundary resistance nears the Curie temperature (∼225 °C–275 °C). At elevated temperature materials show a typically semiconducting nature (i.e., Negative temperature coefficient of resistance (NTCR)).

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Authors and Affiliations

  1. Department of Metallurgy and Materials Engineering, Indian Institute of Technology, Kharagpur, India

    Ashok Kumar

  2. Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur, India

    R. N. P. Choudhary

  3. Department of Physics, T. M. Bhagalpur University, Bhagalpur, India

    B. P. Singh

Authors
  1. Ashok Kumar
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  2. R. N. P. Choudhary
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  3. B. P. Singh
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Correspondence to Ashok Kumar.

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Kumar, A., Choudhary, R.N.P. & Singh, B.P. Structural, dielectric and electrical properties of Te modified barium stannates using impedance analysis. J Mater Sci 42, 8306–8310 (2007). https://doi.org/10.1007/s10853-006-1244-8

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  • DOI: https://doi.org/10.1007/s10853-006-1244-8

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