ELECTRONIC STRUCTURES AND REORIENTATION OF PERPENDICULAR MAGNETIC ANISOTROPY OF Co/Au(111)andCo/Pd(111)

M. Sawada, K. Hayashi and A. Kakizaki
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M. Sawada: Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
K. Hayashi: Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
A. Kakizaki: Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan;

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 865-869

Abstract: We have investigated electronic and magnetic properties of Co thin films epitaxially grown on Au(111) and Pd(111) substrates by spin- and angle-resolved photoelectron spectroscopy. In the Co/Au(111) system, the magnetization direction of Co changes from perpendicular to parallel to the surface at about 6 ML. The origin of the reorientation is qualitatively explained by the increasing contribution of Co3dorbitals perpendicular to the surface. In the Co/Pd(111) system, the reorientation of the magnetization direction occurs at about 4 ML, the origin of which is explained as being due to the contribution of the upperΛ3band of Co with increase of film thickness as in the case of the Co/Au(111) system. The stronger hybridization between Co3dand Pd4dstates in the Co/Pd(111) system causes larger binding energy shifts of theΛ3states than in the Co/Au(111) system.

Date: 2002
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DOI: 10.1142/S0218625X0200307X

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