%0 Journal Article
%A Mavropoulos, Ph.
%A Lounis, S.
%A Blügel, S.
%T Exchange coupling in transition-metal  nanoclusters on Cu(001) and Cu(111) surfaces
%J Physica status solidi / B
%@ 0370-1972
%C Weinheim
%I Wiley-VCH
%M PreJuSER-9515
%P 1187 - 1196
%D 2010
%Z We are indebted to Ondrej Sipr for sending us detailed results on the Co/Au and Co/Pt systems, and to Peter Dederichs and Yuriy Molcrousov for enlightening discussions. Financial support from the Deutsche Forschungsgemeinschaft (DFG), within the Priority Programme 'Clusters in contact with surfaces: electronic structure and magnetism' (SPP-1153), is gratefully acknowledged.
%X We present results of density-functional calculations on the magnetic properties of Cr, Mn, Fe and Co nanoclusters (1-9 atoms large) supported on Cu(001) and Cu(111). The inter-atomic exchange coupling is found to depend on competing mechanisms, namely ferromagnetic double exchange and antiferromagnetic kinetic exchange. Hybridization-induced broadening of the resonances is shown to be important for the coupling strength. The cluster shape is found to affect the coupling via a mechanism that comprises the different orientation of the atomic d-orbitals and the strength of nearest-neighbour hopping. Especially in Fe clusters, a correlation of binding energy and exchange coupling is also revealed. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000278344100025
%R 10.1002/pssb.200945535
%U https://juser.fz-juelich.de/record/9515