Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster 1

MA 19.1: Poster

Dienstag, 6. September 2022, 17:30–20:00, P2

Magnetic states in the FeGe nanocylinder — •Andrii Savchenko^1,2, Fengshan Zheng^3,4, Nikolai Kiselev¹, Luyan Yang³, Filipp Rybakov⁵, Stefan Blügel¹, and Rafal Dunin-Borkowski³ — ¹Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — ²Donetsk Institute for Physics and Engineering, NAS of Ukraine, 03028 Kyiv, Ukraine — ³Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany — ⁴Spin-X Institute, School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices, Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, South China University of Technology, Guangzhou 511442, China — ⁵Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden

Magnetic states in a nanocylinder of B20-type FeGe are studied using off-axis electron holography and micromagnetic simulations [1]. Considering the presence of a damaged layer on the surface of the nanocylinder, which results from focused ion beam milling during sample preparation, we achieved a quantitative agreement between experimental and theoretical images. Remarkably, we identified one of the experimentally observed states as a dipole string composed of two Bloch points of opposite topological charge. 1. A.S. Savchenko et al., arXiv:2205.05753.