A NEUTRON INELASTIC-SCATTERING STUDY OF CU64ZR36 AND NI64ZR36 METALLIC GLASSES

A neutron inelastic scattering study is presented of Cu64Zr36 metallic glass, with isotope substitution for Cu, and the results are compared to earlier data for Ni64Zr36 (Ni isotopic substitution). The availabi lity of two samples for each system, with different isotope content, h as enabled partial vibrational densities of states to be obtained for both materials. The ratios of the average force constants, B-Cu/B-Zr a nd B-Ni/B-Zr, are estimated to be 0.68 +/- 0.1 and 0.73 +/- 0.1, respe ctively. The interatomic interaction of the Cu and Ni atoms with respe ct to all neighbors is weaker than that of the Zr atoms. (C) 1998 Else vier Science B.V. All rights reserved.