CO Chemisorption on Ni(110): Effect on Surface Magnetism

Abstract

The effect of CO chemisorption on the surface magnetism and unfilled electronic structure of Ni(110) is investigated by spin-polarized inverse-photoemission spectroscopy. A saturation in the reduction of the unfilled minority-spin $d$ density of states is observed near 0.5-monolayer CO coverage and attributed to a reduction in the Ni-atom magnetic moments. Transitions into the CO ${\ensuremath{\pi}}^{*}$ band are also observed with an intensity that increases nearly linearly with coverage. No transference of spin polarization from the Ni substrate to the CO ${\ensuremath{\pi}}^{*}$ is found.