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The effective interatomic potential in Ni,,Dy,, glass is obtained with the experimental structure factor S(Q). This potential is compared with those computed using Percus-Yevick (PY) and hypernetted chain (HNC) approximations. A theory of phonons in amorphous solids is employed to compute the eigenfrequencies of the longitudinal and transverse phonon modes with these diffcrcnt potentials and the results are compared with each other. The elastic and thermodynamic properties of this glass are also studied using the longitudinal and transverse sound velocities estimated from the slope of the long-wavelength limit of the dispersion relations.') Jaipur 302004, India.

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