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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Published inarXiv.org
Main Authors Sessi, V, Otte, F, Krotzky, S, Tieg, C, Wasniowska, M, Ferriani, P, Heinze, S, Honolka, J, Kern, K
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 17.03.2014
Subjects
Adatoms
Clusters
Dichroism
Dimers
Exchanging
First principles
Iron
Metal surfaces
Rhodium
Ruthenium
Substrates
Transition metals
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Abstract 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.
AbstractList 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.
Author Sessi, V
Otte, F
Kern, K
Wasniowska, M
Honolka, J
Heinze, S
Krotzky, S
Ferriani, P
Tieg, C
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SubjectTerms Adatoms
Clusters
Dichroism
Dimers
Exchanging
First principles
Iron
Metal surfaces
Rhodium
Ruthenium
Substrates
Transition metals
Title Complex trend of magnetic order in Fe clusters on 4\(d\) transition-metal surfaces
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