Chalcogen adsorption and surface magnetism

Investigations concerning the electronic and magnetic properties of oxygen and sulfur adsorbed on magnetized surfaces were carried out by means of ang le and spin resolving photoelectron spectroscopy. Iron(110), a polycrystall ine iron alloy, and an amorphous metallic glass (Fe79B16Si5) served as ferr omagnetic substrates. Exchange splittings of the O 2p and S 3p derived leve ls could be detected, demonstrating a magnetic coupling between the chemiso rbate and iron. This observation presents a prerequisite for an induced mag netic moment within the adsorbate overlayer. For sulfur an adsorbate-induce d structure only in the minority spin channel near the Fermi level was obse rved which was predicted by theoretical calculations. This feature is local ized in the topmost iron layer. (C) 2000 Elsevier Science BN. All rights re served.