DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2012 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

O: Fachverband Oberflächenphysik

O 91: [MA] Poster II

O 91.48: Poster

Friday, March 30, 2012, 11:00–14:00, Poster A

Complex magnetic ground states observed in Fe nanostructures on different Ir surfaces — •Matthias Menzel1, Kirsten von Bergmann1, Stefan Heinze2, Yuriy Mokrousov3, Gustav Bihlmayer3, Jessica Bickel1, Jens Brede1, Robert Wieser1, Elena Vedmedenko1, Stefan Blügel3, André Kubetzka1, and Roland Wiesendanger11Institut für Angewandte Physik, Universität Hamburg, 20355 Hamburg — 2Institut für Theoretische Physik und Astrophysik, Universität Kiel, 24098 Kiel — 3Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich

The reduced symmetry and large spin-orbit interaction can give rise to complex magnetic ground states in 3d-transition metal nanostructures on heavy element surfaces, e.g. [1]. Especially, Fe nanostructures on an Ir surface are promising candidates for non-collinear magnetic states, due to an extremely weak Heisenberg exchange [2].

Here, we present SP-STM measurements of Fe chains on the (5×1)-Ir(001) surface as well as the Fe monolayer on Ir(111) which reveal atomic-scale, non-collinear magnetic ground states in both systems [3,4]. Density functional theory calculations show that the weak Heisenberg exchange allows other interactions, as the Dzyaloshinskii-Moriya exchange or higher-order interactions, to dominate the energy landscape.

[1] M. Bode et al., Nature 447, 190 (2007).

[2] B. Hardrat et al., PRB 79, 094411 (2009).

[3] S. Heinze et al., Nature Physics 7, 713 (2011).

[4] M. Menzel et al., submitted.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2012 > Berlin