Magnetic relaxation of hydrogen and deuterium in f.c.c. binary alloys

Abstract

Measurements of magnetic relaxations of hydrogen and deuterium in f.c.c. Ni, Co, and Pd alloys reveal a variety of relaxation phenomena in the temperature range 40–220 K. An interpretation of the underlying relaxation mechanisms is given. The activation energies and pre-exponential factors show significant isotope effects. It is concluded that hydrogen isotopes are not distributed statistically in alloys but are strongly influenced by the local environment and statistical inhomogeneities in the alloys. The measurements also yield information on the diffusion coefficients of hydrogen in the alloys as well as in the pure components.