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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/046/0025

    • Keywords

       

      Mixed pyrochlore structure; phonon modes; elastic constants; mechanical properties.

    • Abstract

       

      With widespread physical properties from electrical to catalytic and optical to magnetic, etc., pyrochlore materials have attracted a lot more attention in the application field. In this study, we report the interatomic interactions, frequencies of Raman, and infrared phonon modes at the zone centre of mixed pyrochlore-structured compounds A$_2$GaSbO$_7$ (Y, Dy and Gd). The mechanical and elastic properties of these compounds are also reported. The obtained results show that the interatomic interaction between the atoms A–O is the strongest one as compared to the other interatomic interactions. Born’s stability conditions are found to be satisfied for all the examined compounds, showing their mechanical stability. Further analysis shows the ductile and anisotropic nature of the elastic properties for title compounds. The 3D picture of the elastic properties, such as Young’s modulus, shear modulus, linear compressibility and the Poisson ratio, is also presented and analysed. Furthermore, the obtained results are compared with previously reported theoretical and experimental results, which are found to be in good agreement where available.

    • Author Affiliations

       

      A K KUSHWAHA1 SHIVALI CHAUHAN2 S P MISHRA1 VINOD K YADAV3 R AHMED4 5 BAKHTIAR UL HAQ6 7

      1. Department of Physics, K.N. Government P.G. College, Bhadohi 221 304, India
      2. Department of Physics, M.S.J. Government College, Bharatpur, Rajasthan 321 001, India
      3. Department of Chemistry, K.N. Government P.G. College, Bhadohi 221 304, India
      4. Centre for High Energy Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan
      5. Faculty of Science, Department of Physics, University Teknologi Malaysia, 81310 Johor Bahru, Malaysia
      6. Faculty of Science Education, Jeju National University, Jeju 63243, Republic of Korea
      7. Advanced Functional Materials and Optoelectronics Laboratory (AFMOL), Faculty of Science, Department of Physics, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia

    • Dates

       
      Published
      9 February 2023
      Manuscript received
      11 July 2022
      Accepted
      6 September 2022
      Final version published online
      9 February 2023

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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