COMPUTER-SIMULATION OF AU(001) NI MULTILAYERS - COMPARISON WITH EXPERIMENTS/

The structure of thin Ni film on Au(001) and Au(001)/Ni multilayers is studied as a function of the thickness of Ni using a semiempirical po tential based on the tight-binding second-moment approximation. It is shown that the stable structure is pseudomorphic for a thickness less than five monolayers and [2 (1) over bar (1) over bar 0] hcp or 4H for a greater thickness with close-packed planes perpendicular to the int erfaces. Moreover, we show that a thin Ni film grown on Au(001) substr ate is covered by at least one monolayer of Au. We compare our results with high-resolution electronic microscopy (HREM) and x-ray diffracti on.