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Computation of phonon dynamics of Mg70Zn30 metallic glass

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Abstract

In the present paper, the computation of the phonon dynamics of binary Mg70Zn30 metallic glass is reported using the well-recognized model potential of Gajjar et al. The present study includes the phonon dispersion curves (PDC), elastic and thermodynamic properties such as longitudinal sound velocity υL, transverse sound velocity υT, Debye temperature θD, isothermal bulk modulus B T, modulus of rigidity G, Poisson’s ratio σ and Young’s modulus Y and specific heat capacity C V of the glass. Three theoretical models given by Hubbard–Beeby (HB), Takeno–Goda (TG) and Bhatia–Singh (BS) are used to compute the PDC. Five local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru–Utsumi (IU), Farid et al. (F) and Sarkar et al. (S) are employed for the first time to study the effect of exchange and correlation in the aforesaid properties. The pseudo-alloy-atom (PAA) model is applied for the first time instead of Vegard’s Law.

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Acknowledgements

The author (AMV) is very much thankful to Prof. P. N. Gajjar, Department of Physics, School of Sciences, Gujarat University, Ahmedabad and Prof. A. R. Jani, Department of Physics, Sardar Patel University, Vallabh Vidyanagar under whom this work has been carried out.

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  1. Parmeshwari 165, Vijaynagar Area, Hospital Road, Bhuj-Kutch, 370 001, Gujarat, India

    Aditya Mahabhai Vora

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  1. Aditya Mahabhai Vora
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Correspondence to Aditya Mahabhai Vora.

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Vora, A.M. Computation of phonon dynamics of Mg70Zn30 metallic glass. J Mater Sci 42, 935–940 (2007). https://doi.org/10.1007/s10853-006-0016-9

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