FORMATION OF A BILAYER ORDERED SURFACE ALLOY MN AG(001)/

Low-energy electron diffraction I/V analyses reveal that Mn thin films deposited on Ag(001) at room temperature form substitutional, ordered , bilayer Mn50Ag50 surface alloys. The Mn atoms in this structure have local magnetic moments of considerable value, as judged from the Mn 3 s core level spectra; these local magnetic moments of Mn are effective in the formation of the ordered surface alloy. Ab initio total energy calculations have been done and the results confirmed the experimenta l observations. [S0163-1829(98)03611-X].