Hydrogen diffusion in Zr-Pd amorphous alloys

Nuclear Magnetic Relaxation measurements of the dipolar relaxation rate due to hydrogen diffusion in Zr-Pd amorphous alloys have been conducted and the results interpreted in terms of the random alloy model. It is found that even though the measured activation energy using Torrey's theory changes as the range of composition and temperature are varied, it stays the same for all compositions at the low temperature range. This behaviour is shown to be related to the type and amount of spins participating in the diffusion process. It is also reported here, for the first time, that the interpretation of the NMR results is strongly related to the composition of the alloy under investigation.