The H uptake of asymmetrical Fe/V(001) superlattices was investigated by means of resistometry. The H distribution and enthalpy of solution were simulated by using a diffusion model, and calculated H-H interaction energies. It was found that the strain state of the V lattice strongly affected the H-H interaction. The H-depleted interface region in the V layers was populated at lower concentrations than in previously studied symmetrical samples. This implied that the energy difference between interior and interface regions was lowered. The Y-H binding energy was found to be up to 0.06eV higher than that in symmetrical superlattices.

Effects of Varying Compressive Biaxial Strain on the Hydrogen Uptake of Thin Vanadium (001) Layers. G.Andersson, P.H.Andersson, B.Hjörvarsson: Journal of Physics - Condensed Matter, 1999, 11[35], 6669-77