The diffusion rate of the predominant paramagnetic defect in hydrogenated amorphous material was estimated at temperatures of between 360 and 450C. The diffusion rate for this defect was less than the rate for H. The high defect density of the material tended to retard H diffusion. The results did not support models which assumed a high defect mobility or the occurrence of H motion via paramagnetic defect interactions.

W.Jackson, C.C.Tsai, R.Thompson: Journal of Non-Crystalline Solids, 1989, 114[2], 396-8