Complex trend of magnetic order in Fe clusters on 4$d$ transition-metal surfaces

We demonstrate the occurrence of compensated spin configurations in Fe clusters and monolayers on Ru(0001) and Rh(111) by a combination of X-ray magnetic circular dichroism experiments and first-principles calculations. Our results reveal complex intra-cluster exchange interactions which depend stro...

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Main Authors Sessi, V, Otte, F, Krotzky, S, Tieg, C, Wasniowska, M, Ferriani, P, Heinze, S, Honolka, J, Kern, K
Format Journal Article
LanguageEnglish
Published 17.03.2014
Subjects
Physics - Materials Science
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Summary:We demonstrate the occurrence of compensated spin configurations in Fe clusters and monolayers on Ru(0001) and Rh(111) by a combination of X-ray magnetic circular dichroism experiments and first-principles calculations. Our results reveal complex intra-cluster exchange interactions which depend strongly on the substrate 4$d$-band filling, the cluster geometry as well as lateral and vertical structural relaxations. The importance of substrate 4$d$-band filling manifests itself also in small nearest-neighbor exchange interactions in Fe dimers and in an nearly inverted trend of the Ruderman-Kittel-Kasuya-Yosida coupling constants for Fe adatoms on the Ru and Rh surface.
DOI:10.48550/arxiv.1403.4188