Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 57: Posters Magnetism II

MA 57.33: Poster

Thursday, March 19, 2020, 15:00–18:00, P3

Atom manipulation on complex spin textures — •Andre Kubetzka, Kirsten von Bergmann, Jonas Spethmann, and Roland Wiesendanger — University of Hamburg, Germany

Atom manipulation with the tip of a scanning tunneling microscope (STM) is a widespread and straightforward technique to build complex nanostructures in an atom-by-atom fashion. Here we use atom manipulation of magnetic adatoms to investigate complex spin textures and identify the relevant (magnetic) adatom-surface interactions contributing to the manipulation process. Instead of measuring (spin-dependent) density of states a few atomic distances above the surface, as in standard (spin-polarized) STM, the manipulated adatom can be seen as an extension of the tip probing (spin-dependent) forces right at the surface [1]. This technique can be particularly useful to enhance the magnetic signal [2] or to decide whether a magnetic structure is commensurate with the atomic lattice. Examples are shown for atomic scale spin textures with different symmetries like the row-wise antiferromagnet and the 3Q state in Mn/Re(0001) and the different magnetic states found in Fe layers on Rh/Ir(111).

[1] B. Wolter, Y. Yoshida, A. Kubetzka, S.-W. Hla, K. von Bergmann, and R. Wiesendanger, Spin friction observed on the atomic scale. Phys. Rev. Lett. 109, 116102 (2012).

[2] S. Ouazi, A. Kubetzka, K. von Bergmann, and R. Wiesendanger, Enhanced atomic-scale spin contrast due to spin friction, Phys. Rev. Lett. 112, 076102 (2014).