Abstract
Ion beam mixing experiments have been carried out on evaporated Pd/Al bilayers. Interfaces have been irradiated with 730 keV and 1 Mev Au ions at temperatures ranging between 80 and 573 K. Rutherford backscattering spectroscopy has been used after each irradiation step to characterize the boundary evolution. The mixing rate dependence with fluence, density of energy deposited through nuclear collisions, as well as temperature dependence are studied. Mixing rates are discussed in terms of theoretical models including thermal-spike diffusion, chemical driving forces and radiation-enhanced diffusion processes. Different models to determine the critical temperature above which the thermal actived regime sets in are also discussed.
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