Exchange splitting of adsorbate-induced bands on thin iron films - Getzlaff, M.; Bansmann, J.; Westphal, C.; Schonhense, G. (Elsevier)
Adsorbate-induced bands are investigated using energy-, angle- and spin-resolving photoelectron spectroscopy. With a ferromagnetic substrate these bands can show an exchange splitting. By means of epitaxial growth on W(110) or Au(100) we produced thin bcc iron films, layer-by-layer growth was monitored by means of MEED-oscillations. Spin-resolved spectra for different coverages with chemisorbed oxygen or CO or physisorbed Xe are shown. We found values of up to 1 eV exchange splitting of the oxygen 2p-derived band, analogous to prior measurements on bulk-crystals. Even for the physisorbed species magnetic interaction is evident. Aspects of the angular dependence as well as systematic differences of the line profiles of adsorbate-induced structures in the majority- and minority-spin channels are discussed.
http://linkinghub.elsevier.com/retrieve/pii/0304-8853(92)91546-6
Keywords: U