STUDY OF THE HYDROGEN DIFFUSION IN SUPERLATTICES BY GRAZING ANGLE NEUTRON REFLECTOMETRY

This paper deals with the possibility of studying H diffusion in a sma ll depth range ( almost-equal-to 80 angstrom) with grazing angle neutr on reflectometry. This new optical and nondestructive technique allowe d us to follow the evolution of H in small period superlattices with a small annealing temperature. To illustrate this, a superlattice of 10 (Ni-TiH(x)) sputtered on float-glass is studied. Variations in both ne utron refractive indices of Ni and TiH(x) layers, the period and the n eutron reflectivity of the stratified medium were observed.