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000009515 084__ $$2WoS$$aPhysics, Condensed Matter
000009515 1001_ $$0P:(DE-Juel1)130823$$aMavropoulos, Ph.$$b0$$uFZJ
000009515 245__ $$aExchange coupling in transition-metal nanoclusters on Cu(001) and Cu(111) surfaces
000009515 260__ $$aWeinheim$$bWiley-VCH$$c2010
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000009515 440_0 $$04914$$aPHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS$$v$$x0370-1972$$y5
000009515 500__ $$aWe 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.
000009515 520__ $$aWe 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
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