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Phys. Rev. Lett. 89, 237205 (2002) [4 pages]

Magnetization-Direction-Dependent Local Electronic Structure Probed by Scanning Tunneling Spectroscopy

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M. Bode1,*, S. Heinze1,2,†, A. Kubetzka1, O. Pietzsch1, X. Nie2, G. Bihlmayer2, S. Blügel2,‡, and R. Wiesendanger1
1Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany
2Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany

Received 21 December 2001; published 18 November 2002

Scanning tunneling spectroscopy (STS) of thin Fe films on W(110) shows that the electronic structure of domains and domain walls is different. This experimental result is explained on the basis of first-principles calculations. A detailed analysis reveals that the spin-orbit induced mixing between minority dxy+xz and minority dz2 spin states depends on the magnetization direction and changes the local density of states in the vacuum detectable by STS. As a consequence nanometer-scale magnetic structure information is obtained even by using nonmagnetic probe tips.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.237205
DOI:
10.1103/PhysRevLett.89.237205
PACS:
75.90.+w, 07.79.Cz, 75.60.Ch

*Email address: mbode@physnet.uni-hamburg.de

Present address: IBM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598.

Permanent address: Fachbereich Physik, Universität Osnabrück, 49069 Osnabrück, Germany.