Dresden 2020 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 30: Poster Session - Surface Magnetism
O 30.9: Poster
Montag, 16. März 2020, 18:15–20:00, P1A
Measuring the exchange force field of a non-collinear magnetic structure on the atomic scale — Nadine Hauptmann1, Soumyaiyoti Haldar2, Tzu-Chao Hung1, Wouter Jolie1, •Lorena Niggli1,3, Mara Gutzeit2, Daniel Wegner1, Stefan Heinze2, and Alexander A. Khajetoorians1 — 1Scanning Probe Microscopy Department, IMM, Radboud University, Nijmegen, Netherlands — 2Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, Germany — 3Department of Physics, University of Zurich, CH-8057 Zurich, Switzerland
One route toward creating magnetic memory down to the level of individual atoms, relies on utilizing chiral magnetic structures, which are stabilized by a combination of various atomic-scale exchange interactions. Understanding these interactions is vital toward creating magnetic memory, necessitating methodology to quantify and manipulate exchange interactions on the atomic scale. Here, we present highresolution imaging of a chiral magnetic structure along with quantifying atomic-scale magnetic exchange interactions [1]. Using the combination of spin-polarized tunneling current and exchange force detection (SPEX), we quantify the exchange interaction between a ferromagnetic probe and the cycloidal spin spiral in 1ML Mn/W(110). We not only resolve the nearly antiferromagnetic atomic unit cell, but also the exchange force field along the spin spiral.
[1] N. Hauptmann et al., arXiv:1908.00959