Neutron and X-ray reflectivity analysis of ceramic-metal materials

Neutron and X-ray reflectivity measurements of a thin film of cermet (ceram ic-metal) made by co-sputtering Pt and Al2O3 on the surface of a flat piece of float glass are presented. From the analysis of the specular and off-sp ecular measurements, the morphology of the Pt clusters which are embedded i n the Al2O3 matrix is determined by adjusting a model to the observed data. It is found that the structure of such films presents a certain degree of order in the direction normal to the surface of the films but no correlatio n (or with a very short correlation length not measurable by this technique ) in the plane of the film. (C) 1999 Elsevier Science S.A. All rights reser ved.