• V Ravi Kumar

      Articles written in Bulletin of Materials Science

    • Elastic properties of ZnF2-PbO-TeO2 glasses doped with certain rare earth ions

      V Ravi Kumar N Veeraiah

      More Details Abstract Fulltext PDF

      The elastic moduli (Y, η, σ andH) and some thermodynamical parameters, such as Debye temperatureθD, diffusion constantDi and latent heat of melting ΔHm, of ZnF2-PbO-TeO2 glasses doped with some rare earth (Pr3+, Nd3+, Eu3+ and Tb3+) ions are determined as functions of temperature using piezo electric composite oscillator technique. All the parameters are found to decrease with increase in the atomic number Z of the rare earth ions and with increase in the temperature of measurement. The results are explained on the basis of the density of localized bonding defect states within the band gap of the material.

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    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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