Phys. Rev. Lett. 87, 067201 (2001) [4 pages]Anisotropic Spin-Orbit Coupling and Magnetocrystalline Anisotropy in Vicinal Co Films |
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Sarnjeet S. Dhesi
European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
Gerrit van der Laan and Esther Dudzik *
Magnetic Spectroscopy Group, Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
Alexander B. Shick
Department of Physics, University of California, Davis, California 95616
Received 7 December 2000; published 18 July 2001
The anisotropy of the spin-orbit interaction, 〈λa〉, in vicinal Co films has been measured using x-ray magnetic linear dichroism (XMLD). A linear increase in 〈λa〉 with Co step density is found using a new sum rule and represents the first experimental confirmation that XMLD probes the magnetocrystalline anisotropy energy (MAE). X-ray magnetic circular dichroism is used to confirm that the XMLD arises from changes in the local step-edge electronic structure. The XMLD sum rule gives a larger MAE compared to macroscopic values and is discussed with respect to other local probes of the MAE.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v87/e067201
DOI: 10.1103/PhysRevLett.87.067201
PACS: 75.70.Ak, 75.30.Gw, 75.70.Rf
* Present address: Hahn-Meitner-Institut, Glienicker Strasse 100, D-14109 Berlin, Germany.
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