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J. Phys.: Condens. Matter 5 (1993) pp. 4647-4664
Fe on Au(001): magnetism and band formation
Institute for Theoretical Physics, Catholic University of Nijmegen, Toernooiveld, NL-6525 ED Nijmegen, The Netherlands
Abstract
The development of thin-film electronic and magnetic properties with film size are
addressed in a study of Fe on Au(001), up to 10 Fe layers thick and including the
Au overlayer formed during normal growth conditions. Enhanced moments at the
Fe/Au interface are observed, decaying to bulk over 3 Fe layers, and the weak
Fe-Au interaction is reflected in moments similar to those of the Fe(001)
surface and in a very small asymmetry in the magnetic properties of the Fe film.
Calculated hyperfine fields are found to exhibit a strong dependence upon
film thickness and no simple relationship with the local spin moments.
Densities of states and core-level shifts reflect changes in nearest-neighbour
species and give a consistent picture of the interface bonding. The development
of zone-centre states with film thickness is followed, and bulk-band overlap
and interfacial bonding are found to influence the distribution of quantum well
states strongly.