Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 3: Scanning Probe Techniques: Method Development I

O 3.5: Vortrag

Montag, 20. März 2017, 11:30–11:45, TRE Phy

Utilizing STM and AFM simultaneously to study atomic-scale magnetism — •Nadine Hauptmann, Jan Gerritsen, Daniel Wegner, and Alexander Ako Khajetoorians — Institute for Molecules and Materials, Radboud University, 6500 GL Nijmegen, The Netherlands

Recent developments in surface and interfacial magnetism have raised the question if it is possible to realize a memory derived from single atoms or nanometer sized skyrmions. Therefore, it is important to understand how the local magnetic anisotropy driven by the crystal field symmetry, magnetic exchange, and hybridization influences the magnetization at the atomic length scale. Nevertheless, a vast majority of atomic-scale studies have utilized spin-polarized scanning tunneling microscopy (SP-STM), limiting the scope of materials which can be probed. In order to gain new insight into magnetism at the atomic scale, we combine SP-STM with magnetic exchange force microscopy (MExFM), based on a qPlus tuning fork design. We discuss our recent developments and demonstrate that our approach enables simultaneous measurement of the spin polarized current and the exchange force at the single atom level.