• Dielectric properties of LiF-B2O3 glasses doped with certain rare earth ions

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      https://www.ias.ac.in/article/fulltext/boms/021/04/0341-0347

    • Keywords

       

      Dielectric properties; LiF-B2O3 glasses; rare earth ions; QMT model

    • Abstract

       

      Dielectric constantɛ, loss tanδ and a.c. conductivityσ of LiF-B2O3: Ln3+ (where Ln=Ce, Pr, Nd and Tb) glasses are studied as functions of frequency (in the range 102–106 Hz) and temperature (range 30–200°C). The dielectric breakdown strength of these glasses was also determined at room temperature in an air medium. The rate of increase ofɛ and tanδ with temperature decreases with decrease in the ionic radius of RE3+ ion whereas the dielectric breakdown strength, the activation energy for a.c. conduction in the high temperature region decreases with increase in the ionic radius of RE3+ ion. An attempt has been made to explain the a.c. conduction in these glasses on the basis of quantum mechanical tunnelling (QMT) model.

    • Author Affiliations

       

      A V Ravi Kumar1 2 B Apparao1 2 N Veeraiah1 3

      1. Department of Physics, Nagarjuna University PG Centre, Nuzvid - 521 201, India
      2. Department of Physics, Andhra Loyola College, Vijayawada - 520 008, India
      3. Department of Physics, P.G. College of Science, Saifabda, Osmania University, Hyderabad - 500 007, India
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