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APS » Journals » Phys. Rev. Lett. » Volume 87 » Issue 12
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Phys. Rev. Lett. 87, 127201 (2001) [4 pages]

Atomic-Scale Magnetic Domain Walls in Quasi-One-Dimensional Fe Nanostripes

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M. Pratzer and H. J. Elmers
Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55099 Mainz, Germany

M. Bode, O. Pietzsch, A. Kubetzka, and R. Wiesendanger
Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany

Received 31 May 2001; published 28 August 2001

Fe nanostripes on W(110) are investigated by Kerr magnetometry and spin-polarized scanning tunneling microscopy (SP-STM). An Arrhenius law is observed for the temperature dependent magnetic susceptibility indicating a one-dimensional magnetic behavior. The activation energy for creating antiparallel spin blocks indicates extremely narrow domain walls with a width on a length scale of the lattice constant. This is confirmed by imaging the domain wall by SP-STM. This information allows the quantification of the exchange stiffness and the anisotropy constant.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.127201
DOI:
10.1103/PhysRevLett.87.127201
PACS:
75.75.+a, 75.25.+z, 75.60.Ch
 
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