Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 112: Electronic structure: Surface magnetism and spin phenomena II
O 112.10: Vortrag
Freitag, 16. März 2018, 12:45–13:00, MA 042
Revealing the interplay between surface reconstruction and magnetic order in Fe bilayers on Ir(111) — •Nadine Hauptmann1, Melanie Dupé2, Tzu-Chao Hung1, Alexander K. Lemmens1, Jairo Sinova2, Stefan Heinze3, Daniel Wegner1, Bertrand Dupé2, and Alexander A. Khajetoorians1 — 1Institute for Molecules and Materials, Radboud University, 6525 AJ Nijmegen, Netherlands — 2Institut für Physik, Johannes Gutenberg Universität Mainz, D-55099 Mainz, Germany — 3Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany
Chiral magnets, e.g. magnetic skyrmions have attracted heavy interest due to their potential application for nano-scale magnetic storage. Their stabilization depends on the interplay between mainly the magnetic exchange and Dzyaloshinskii-Moriya interaction. The latter one strongly depends on the geometric structure. A vast majority of atomic-scale studies have utilized spin-polarized scanning tunneling microscopy (SP-STM). However, with SP-STM it is difficult to distinguish between structural corrugation and electronic and magnetic properties. We use a recently developed combination of SP-STM and magnetic exchange force microscopy (SPEX) to study the spin spirals in the reconstruction line network in a bilayer Fe on Ir(111). We show that with SPEX and DFT calculations we can obtain a detailed understanding of both the structure and the electronic and magnetic properties. Our work is important to understand the origin of magnetic order in atomic-scale magnetic non-collinear systems.