Nanocrystalline specimens with an ultra-fine eutectic microstructure were prepared by melt-spinning. Short-range diffusion in the alloys was studied by means of magnetic after-effect measurements. It was found that the activation enthalpies decreased with increasing H content, and exhibited an isotope effect. The activation enthalpies for H ranged from 0.32 to 0.50eV for D and from 0.27 to 0.48eV for H.

Hydrogen and Deuterium Diffusion in Nanocrystalline La(Ni0.7Fe0.3)0.5–Ni0.7Fe0.3 Alloys. M.Hirscher, H.Kronmuller: Physica Status Solidi A, 1998, 165[2], 395-400