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    • Keywords


      Chalcogenides; optical parameters; elastic moduli; electronic polarizability.

    • Abstract


      The present study deals with the effect of composition on the elastic and optical properties of Ge$_x$Se$_2$Sb$_{1−x}$ ($0.0 \le x \le 1.0$) glasses. The various elastic moduli of these glasses such as Young’s modulus ($Y$) andthe bulk modulus ($B$) along with the micro-hardness ($H$), Poisson’s ratio ($\rho$) and Debye temperature ($T_D$) were obtained from the values of the longitudinal ($v_l$) and shear ($v_s$) ultrasonic velocities. On the basis of measurementsof the transmittance and reflectance spectra in the wavelength range of 0.4–2.5 $\mu$m the optical constants such as the film thickness ($t$), the refractive index ($n$) and the optical band gap ($E_g$) were investigated with high accuracy. The optically determined bulk modulus of these glasses was in good agreement with that elastically investigated. The obtained results were discussed in terms of the changes in the glass density, electronegativity and electronic polarizability with the variation in antimony content.

    • Author Affiliations



      1. Physics Department, Faculty of Science and Arts Khulais, Jeddah University, P.O. Box 80200, 21589 Khulais, Saudi Arabia
      2. Physics Department, Faculty of Science, Al-Azhr University (Assiut Branch), Assiut 71524, Egypt
      3. Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
    • Dates

  • Bulletin of Materials Science | News

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      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

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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