Complex trend of magnetic order in Fe clusters on 4d transition-metal surfaces. I. Experimental evidence and Monte Carlo simulations

0432512 - FZÚ 2015 RIV US eng J - Journal Article
Sessi, V. - Otte, F. - Krotzky, S. - Tieg, C. - Wasniowska, M. - Ferriani, P. - Heinze, S. - Honolka, Jan - Kern, K.
Complex trend of magnetic order in Fe clusters on 4d transition-metal surfaces. I. Experimental evidence and Monte Carlo simulations.
Physical Review. B. Roč. 89, č. 20 (2014), "205425-1"-"205425-6". ISSN 1098-0121
Institutional support: RVO:68378271
Keywords : iron atoms on 4d metal surfaces * surface magnetism * complex spin order * indirect exchange interactions
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.736, year: 2014

We demonstrate the occurrence of compensated spin configurations in Fe clusters and monolayers on Ru(0001) and Rh(111) by a combination of x-raymagnetic circular dichroism experiments, first-principles calculations, and Monte Carlo simulations. Our results reveal complex intracluster exchange interactions which depend strongly on the substrate 4d-band filling, the cluster geometry, as well as lateral and vertical structural relaxations. The importance of substrate 4d-band filling manifests itself also in small nearest-neighbor exchange interactions in Fe dimers and in a nearly inverted trend of the Ruderman-Kittel-Kasuya-Yosida coupling constants for Fe adatoms on the Ru and Rh surface.
Permanent Link: http://hdl.handle.net/11104/0236849