PHOTOEMISSION-STUDIES OF THE CERIUM ELECTRONIC-PROPERTIES AT THE CE FE(100) INTERFACE/

Electronic properties of cerium ultra-thin films deposited on Fe(100) surfaces at room temperature have been investigated by Ce 4f resonant photoemission and Ce 3d X-ray photoemission experiments. For thickness es lower than 4 monolayers, cerium is found to be in a strongly hybrid ized phase. By covering cerium films with three samarium layers, we ha ve suppressed the Ce-vacuum interface in which the Ce atoms are less s trongly hybridized. In this way, it is also possible to obtain the Ce 3d photoemission contributions from each atomic layer. It is then high lighted that the electronic structure of these layers are very differe nt from each other. By combining basic contributions, it is possible t o reconstruct the Ce 3d experimental spectra obtained for all cerium f ilm thicknesses.