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Cobalt nanoclusters on metal-supported Xe monolayers: Influence of the substrate on cluster formation kinetics and magnetism

DOI: 10.1103/PhysRevB.81.195403 DOI Help

Authors: V. Sessi (Max-Planck-Institut für Festkörperforschung) , K. Kuhnke (Max-Planck-Institut für Festkörperforschung) , J. Zhang (Max-Planck-Institut für Festkörperforschung) , J. Honolka (Max-Planck-Institut für Festkörperforschung) , K. Kern (Max-Planck-Institut für Festkörperforschung) , A. Enders (Department of Physics and Astronomy and MCMN, University of Nebraska) , P. Bencok (Diamond Light Source) , S. Bornemann (Department Chemie und Biochemie, Ludwig-Maximilians-Universität München) , J. Minar (Department Chemie und Biochemie, Ludwig-Maximilians-Universität München) , H. Ebert (Department Chemie und Biochemie, Ludwig-Maximilians-Universität München)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B

State: Published (Approved)
Published: May 2010

Abstract: The growth dynamics of submonolayer coverages of cobalt during buffer-layer assisted growth on Ag(111) and Pt(111) substrates is investigated by variable temperature scanning tunneling microscopy in the temperature range between 80 and 150 K. It is found that attractive cluster-substrate interactions can govern the cluster formation on the Xe buffer layer if the Xe layer is sufficiently thin. The interpretation of the microscopy results is supported by x-ray magnetic circular dichroism data which monitor the effect of cluster-substrate interactions on the formation of magnetic moments and magnetic anisotropy of Co nanocluster during the different stages of growth. Ab initio calculations show that the cluster magnetism is controlled by the interface anisotropy, leading to perpendicular magnetization for Co on Pt(111). Limits of and new potential for nanocluster fabrication by buffer-layer-assisted growth are discussed

Subject Areas: Physics

Facility: ESRF

Added On: 14/05/2010 16:34

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