• Electric field dependence of the Curie temperature and microwave absorption in displacive ferroelectrics with impurities

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      https://www.ias.ac.in/article/fulltext/pram/014/02/0149-0158

    • Keywords

       

      Displacive ferroelectrics; anharmonicity; electric dipolemoment; microwave absorption; Curie temperature

    • Abstract

       

      The electric field dependence of the complex dielectric constant in an anharmonic defect ferroelectric crystal is calculated in its paraelectric phase from the Silverman-Joseph-Hamiltonian augmented with fourth-order phonon coordinates using double-time Green’s functions. The field and impurity dependence of the shift in the Curie temperature is discussed. An expression is obtained for the electric field dependence of dielectric loss at microwave frequencies in defect ferroelectrics.

    • Author Affiliations

       

      U C Naithani1 2 B S Semwal1

      1. Department of Physics, Garhwal University, Srinagar - 246 174
      2. Department of Physics, Garhwal University, Pauri - 246 001
    • Dates

       
  • Pramana – Journal of Physics | News

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