Gorsky relaxation and hydrogen diffusion in the metallic glass Pd80Si20

A Gorsky relaxation associated with the long-range diffusion of hydrogen has been observed for the first time in a metallic glass. The diffusion parameters for amorphous Pd80Si20 are QD=0.25 eV and D0=0.003 cm2/sec. From the characteristics of a complementary reorientation relaxation, it is concluded that the interstitial sites occupied by hydrogen possess a distinctly asymmetric character. © 1981 The American Physical Society.