Further Measurements of the Specific Heats at Low Temperatures in Metallic Glasses. Final Report

摘要

The effect of the crystallization on the electronic structure and on certain lattice properties of amorphous alloys, Pd--Si and Pd--Si--Cu, is considered. In earlier experiments, the temperature dependence of the low temperature specific heats for non-magnetic amorphous alloys was established. The customary fitting equation C = gamma T + alpha T exp 3 + deltaT exp 5 was found to describe adequately the data for all amorphous samples studied. The linearly temperature dependent term gamma T, which measures the density of states at the Fermi level after the correction for the electron-phonon interaction and the non-crystalline effect, was found to be strongly dependent on composition. A large, broad maximum was observed at about 19 at.% Si in the binary system. The results were discussed in terms of the interaction of the conduction electrons with the first peak of the structure factor S(q). (ERA citation 04:014012)