MAGNETISM OF FE ON AU(100) IN THE MONOLAYER LIMIT

We report a spin-resolved inverse photoemission study of the electroni c structure of Fe/Au(100) thin films, concentrating on states at the c enter of the surface Brillouin z;one and film thicknesses in the monol ayer regime. We identify states with minority-spin character 0.7 eV ab ove the Fermi level, confirming previous tentative assignments based u pon spin-integrated studies. However, a feature previously assigned to a quantum-well state is found to be exchange split by only similar or equal to 200 meV, too small to originate from Fe-derived states, but in line with self-consistent band-structure calculations that predict an Au-derived interface state.