Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Poster Session II

MA 48.31: Poster

Donnerstag, 10. März 2016, 15:00–18:00, Poster B1

First-principles study of magnetism in FeIr bilayers on Rh(001) — •Sebastian Meyer, Bertrand Dupé, Paolo Ferriani, and Stefan Heinze — Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, Leibnizstr. 15, 24098 Kiel

Recently, complex non-collinear spin structures such as spin spirals, spin lattices or skyrmions have been discovered at transition-metal surfaces [1-3]. In particular, the magnetic ground state of Fe monolayers can be tuned at interfaces with other 4d and 5d transition-metals [4]. Here, we use density functional theory as implemented in the full-potential linearized augmented plane wave method to investigate the magnetic properties of bilayers from Fe and Ir on the Rh(001) surface. We consider both ways of growing the bilayer on the substrate, i.e. Fe/Ir/Rh(001) and Ir/Fe/Rh(001). Both systems are structurally relaxed and the magnetic ground state is determined by total energy calculations. We compare the ferro- and antiferromagnetic state of the Fe monolayer and find a significant influence of the stacking sequence of the bilayer. The calculated energy dispersion of spin spirals provides evidence for a non-collinear ground state.
  [1] S. Heinze et al., Nature Phys. 7, 713 (2011).
  [2] M. Hoffmann et al., Phys. Rev. B 92, 020401(R) (2015).
  [3] N. Romming et al., Science 341, 636 (2013).
  [4] B. Hardrat et al., Phys. Rev. B 79, 094411 (2009).