Exchange coupling in transition-metal nano-clusters on Cu(001) and Cu(111) surfaces
作者： Stefan Blügel , Samir Lounis , Phivos Mavropoulos
关键词: Antiferromagnetism 、 Cluster (physics) 、 Binding energy 、 Chemical physics 、 Kinetic energy 、 Materials science 、 Ferromagnetism 、 Condensed matter physics 、 Transition metal 、 Coupling 、 Nano clusters
摘要: We present results of density-functional calculations on the magnetic properties Cr, Mn, Fe and Co nano-clusters (1 to 9 atoms large) supported Cu(001) Cu(111). The inter-atomic exchange coupling is found depend competing mechanisms, namely ferromagnetic double antiferromagnetic kinetic exchange. Hybridization-induced broadening resonances shown be important for strength. cluster shape weaken via a mechanism that comprises different orientation atomic d-orbitals strength nearest-neighbour hopping. Especially in clusters, correlation binding energy also revealed.
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