• X-ray determination of the mean amplitudes of vibration and debye temperatures of some rare earth monochalcogenides

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    • Keywords

       

      Lattice dynamics; Debye temperature; rare earth chalcogenides

    • Abstract

       

      The x-ray diffraction intensities of Bragg reflections have been measured at room temperature for thulium selenide, samarium sulphide, samarium selenide and samarium telluride. On the basis of a common amplitude approximation, the Debye-Waller factor, the mean amplitude of vibration and the Debye temperature have been evaluated. The values of the Debye temperatures and mean amplitudes of vibration are 176±16°K, 0·185 ± 0·017 Å (TmSe), 155 ± 7°K, 0·244 ± 0·012 Å (SmS), 153 ± 14°K, 0·221 ± 0·020 Å (SmSe) and 151 ± 20°K, 0·204 ± 0·027 Å (SmTe).

    • Author Affiliations

       

      KG Subhadra1 DB Sirdeshmukh1

      1. Physics Department, Kakatiya University, Warangal - 506 009
    • Dates

       
  • Pramana – Journal of Physics | News

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