TY  - JOUR
AU  - Mavropoulos, Ph.
AU  - Lounis, S.
AU  - Blügel, S.
TI  - Exchange coupling in transition-metal  nanoclusters on Cu(001) and Cu(111) surfaces
JO  - Physica status solidi / B
SN  - 0370-1972
CY  - Weinheim
PB  - Wiley-VCH
M1  - PreJuSER-9515
SP  - 1187 - 1196
PY  - 2010
N1  - 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.
AB  - 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
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000278344100025
DO  - DOI:10.1002/pssb.200945535
UR  - https://juser.fz-juelich.de/record/9515
ER  -