Dynamic Monte Carlo simulation for ion beam mixing

A dynamic Monte Carlo simulation (MCS) has been carried out to elucidate the dynamic mixing process and the atomic transport in Al-Pd bilayer systems. MCS results reveal that the inward atomic transport is controlled by both anisotropic and isotropic atomic transport, and the outward atomic transport is governed by only the isotropic motion. Thus the inward transport always dominates over the outward motion. Both the anisotropic and isotropic term have overlayer thickness dependence, which has a close relation with the mixing rate.