Abstract
The phonon dispersion curves (PDC) of Ca70Mg30 metallic glasshas been studied at room temperature in terms of phonon eigenfrequencies of longitudinal and transverse modes employing threedifferent approaches proposed by Hubbard and Beeby (J. Phys. C: SolidState Phys. 13 (1969) 556), Takeno and Goda (Prog. Theor. Phys. 45(1971) 331; 47 (1972) 790) and Bhatia and Singh (Phys. Rev. B 31 (1985)4751). The well recognized model potential of Gajjar et al. is employed successfully toexplain electron-ion interaction in the metallic glass. The effectivepair potential is used to generate the pair correlation function g(r).The local field correction function (Int. J. Mod. Phys. B 17 (2003)6001) is used for the first time to introduce the exchange andcorrelation effects on the aforesaid properties. The present findings ofPDCs are found to be in agreement with the available theoretical as wellas experimental data. The thermodynamic and elastic properties, i.e.longitudinal and transverse sound velocities, isothermal bulk modulus,modulus of rigidity, Poisson's ratio, Young's modulus and Debyetemperature, are also investigated successfully.
Published Version
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