SUPERCONDUCTING AND TRANSPORT PROPERTIES AND THE MIXING PROCESS IN Al/Si MULTILAYER FILMS.

The superconducting and transport properties were studied to probe the mixing process in Al/Si multilayer films during Ar ion bombardment at liquid helium temperature. From the dose-dependences of the superconducting transition temperature T//c and the electrical resistance R//0, an effective diffusion constant D* was evaluated. A good agreement between this D* with the value of the ballistic mixing theory suggests that, at low temperatures where diffusion is hardly activated the ballistic effect predominates the mixing process for the Al/Si system, where the heat of mixing has a small negative value.EI0156-60B3