STRUCTURE AND DYNAMICS OF AMORPHOUS ZR-BE ALLOYS

The extensive study of the short-range order structure, atomic vibrati on spectrum and electronic properties of amorphous alloys Zr1-cBec (c = 0.3-0.5) is performed using neutron scattering and specific heat mea surements. An increase in the Be concentration in the amorphous alloy reduced the distances between nearest similar atoms, shifted and broad ened the high-energy part of the vibrational spectrum, increased the D ebye temperature and decreased the density of the electron states as w ell as the superconducting transition temperature. An analysis of the partial radial distributions, obtained by Monte Carlo modeling, indica ted that the atomic structure of the amorphous Zr-Be alloys was domina ted by geometrical factors, such as the atom sizes and system composit ion. The density of the vibrational states calculated by the recursion method for the structural model with a large number of atoms reproduc ed well all the main features of the experimental spectra.