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    • A lattice dynamical investigation of the Raman and infrared wavenumbers of Ba$_2$MgTeO$_6$ double-perovskite oxide

      OM PRAKASH RUBY JINDAL ARCHANA TRIPATHI

      Volume 46 Published: 22 May 2023 Article ID 0106

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/046/0106

    • Keywords

       

      Raman and infrared wavenumber; double perovskite; phonon.

    • Abstract

       

      The Raman and infrared phonons in the tetragonal structure of double-perovskite Ba$_2$MgTeO$_6$ with space group I4/m have been studied using a short-range force constant model. This study used six stretching and two bending force constants to calculate zone centre phonons theoretically using the normal coordinate analysis. Some optical vibrational modes have been reported for the first time for Ba$_2$MgTeO$_6$ compounds in the I4/m phase using Wilson’s GF-Matrix method. The rest of the phonon modes calculated in this work have been compared with the available experimentally observed frequencies in the literature. The significance of interatomic force constant in the calculated Raman and infrared phonons has also been investigated in the potential energy distributions for the double-perovskite compound Ba$_2$MgTeO$_6$.

    • Author Affiliations

       

      OM PRAKASH1 2 RUBY JINDAL1 ARCHANA TRIPATHI3

      1. Department of Physics, School of Basic and Applied Sciences, K.R. Mangalam University, Gurugram 122103, India
      2. Department of Physics, Dr. B R Ambedkar Government College, Palwal 121102, India
      3. Physics Department, Deshbandhu College (University of Delhi), New Delhi 110019, India

    • Dates

       
      Published
      22 May 2023
      Manuscript received
      14 December 2022
      Accepted
      13 February 2023
      Final version published online
      22 May 2023

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