Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Magnetismus
MA 18: Magnetische dünne Schichten III
MA 18.5: Vortrag
Montag, 7. März 2005, 11:30–11:45, TU H1028
Revealing Antiferromagnetic Order of the Fe Monolayer on W(001) — •André Kubetzka1, Paolo Ferriani1, Matthias Bode1, Stefan Heinze1, Gustav Bihlmayer2, Kirsten von Bergmann1, Oswald Pietzsch1, Stefan Blügel2, and Roland Wiesendanger1 — 1Institute of Applied Physics, Univerity of Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany — 2Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany
Although the system of one monolayer Fe on W(001) has been studied extensively in the past, experiments only deduced that the magnetic ground state is not ferromagnetic [1] while theoretical predictions are still controversal [2,3]. Employing spin-polarized scanning tunneling microscopy (SP-STM) we obtained atomic resolution images showing that a c(2×2) antiferromagnetic structure with an out-of-plane magnetization direction is the magnetic ground state. Since, in contrast, the Fe ML is ferromagnetic on W(110), we thereby show that the type of magnetic order can be changed by a proper choice of the substrate orientation alone. These results are explained based on first-principles calculations.
[1] G.A. Mulhollan et al., Phys. Rev. B 43, 13645 (1991)
[2] R. Wu and A.J. Freeman, Phys. Rev. B 45, 7532 (1992)
[3] X. Qian and W. Hübner, Phys. Rev. B 67, 184414 (2003)