Magnetism of nanostructures studied by x-ray magnetic circular dichroism: Fe on Cu(111)
2000 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 62, no 9, 5803-5809 p.Article in journal (Refereed) Published
Epitaxial growth of Fe on a stepped Cu(111) surface leads to the formation of fee Fe stripes along the step edges for coverages lower than 1.5 monolayer (ML). Using the sensitivity of the x-ray magnetic circular dichroism and sum-rule analysis, the changes in the magnetic properties in the low thickness range from similar to 5% of a monolayer to 4 ML, covering the one-dimensional (1D) coalescence (similar to 0.8 ML) and the 2D percolation limit (similar to 1.5 ML), have been determined. The determination of the spin moment (m(spin)) indicates significant features which can be correlated to the morphological transition. In particular, the m(spin) decreases at the 1D coalescence limit, but increases as the film reaches the 2D percolation limit and starts to transform into the bcc phase. This behavior is tentatively ascribed to the decrease in the Fe atomic volume, as it is well known that such changes can dramatically modify the magnetic properties of gamma-Fe.
Place, publisher, year, edition, pages
2000. Vol. 62, no 9, 5803-5809 p.
transition-metal multilayers, assembled co clusters, thin-films, ultrathin films, sum-rule, orbital magnetization, cu 111, au(111), cu(100), moment
IdentifiersURN: urn:nbn:se:kth:diva-20026ISI: 000089212900088OAI: oai:DiVA.org:kth-20026DiVA: diva2:338719
QC 201005252010-08-102010-08-10Bibliographically approved