Dresden 2006 – wissenschaftliches Programm
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MA: Magnetismus
MA 35: Magnetic Thin Films V
MA 35.6: Vortrag
Freitag, 31. März 2006, 12:00–12:15, HSZ 03
Interface tuning of magnetic interactions of the Fe monolayer on 5d metal substrates — •Paolo Ferriani1, Ilja Turek2, Stefan Heinze1, Gustav Bihlmayer3, and Stefan Bluegel3 — 1Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Hamburg, Germany — 2Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, Czech Republic — 3Institute für Festkörperforschung, Forschungszentrum Jülich, Jülich, Germany
Magnetic systems play a central role in today’s information technology. Stabilising a magnetic state is essential for possible applications of a material. The capability of controlling the magnetic order of a specific material would be of great advantage in this respect, but it remains a challenge. Low-dimensional systems offer new possibilities to tune the magnetic interactions. Recently, it has been proved that an antiferromagnetic structure can be stabilised for a monolayer of Fe, the prototypical ferromagnetic material, by growing it on the W(001) surface [1].
In this work, we deal with the interface tuning of the exchange interaction as a way to control the magnetic order. Based on density functional theory calculations, we show how the magnetic state of an Fe monolayer can be selected by a proper choice of the substrate composition. We demonstrate that the magnetism of an Fe monolayer on W(001) depends on the substrate d-band filling. By alloying the W substrate with Ta, the neighboring element of W, it is thus possible to tune the exchange interaction in the overlayer and stabilise novel magnetic states.
[1] A. Kubetzka et al., Phys. Rev. Lett. 94, 087204 (2005)