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    • Keywords


      Ceramics; solid-state reaction; morphotropic phase boundary; negative temperature coefficient of resistance; conductivity; complex impedance spectroscopy.

    • Abstract


      The polycrystalline samples of gadolinium (Gd)-modified lead-zirconate-titanate (Pb$_{1−x}$Gd$_x$(Zr$_{0.52}$Ti$_{0.48})_{1−x/4}$O$_3$) ($x$ = 0, 0.07, 0.10 and 0.12) (PGZT) ceramics near morphotropic phase boundary (MPB) were prepared by high-temperature solid-state reaction route. Electrical properties such as impedance ($Z$), modulus ($M$) and conductivity ($\sigma$) of the materials have been investigated within a wide range of temperature and frequency. Complex impedance spectroscopy (CIS) studies show that materials exhibit bulk (grain) resistive contributions, negative temperature coefficient of resistance (NTCR) and non-Debye-type dielectric relaxation. The nature of temperature and frequency dependence of conductivity follows Jonscher’s universal power law. $J–E$ characteristics reveal that the materials exhibit semiconducting behaviour and allow a very small leakage current to pass through them.

    • Author Affiliations



      1. Department of Physics, Tihidi College, Tihidi 756 130, India
      2. Department of Physics, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan deemed to be University, Bhubaneswar 751 030, India
      3. Department of Physics, VSSUT, Burla, Sambalpur 768 018, India
      4. School of Physics, Sambalpur University, Burla, Sambalpur 768 019, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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