Regensburg 2019 – scientific programme

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MA: Fachverband Magnetismus

MA 15: Magnetism Poster A

MA 15.15: Poster

Tuesday, April 2, 2019, 10:00–13:00, Poster E

Novel Topological Spin Textures in Helimagnetic FeGe — •Erik Lysne^1,2, Mariia Stepanova^1,2, Peggy Schoenherr³, Jan Müller⁴, Laura Köhler⁵, Achim Rosch⁴, Naoya Kanazawa⁶, Yoshinori Tokura^6,7, Markus Garst^4,5, and Dennis Meier^1,2 — ¹NTNU, Trondheim, Norway — ²Center for Quantum Spintronics, NTNU, Trondheim, Norway — ³ETH Zurich, Zürich, Switzerland — ⁴Universität zu Köln, Köln, Germany — ⁵Technische Universität Dresden, Dresden, Germany — ⁶University of Tokyo, Tokyo, Japan. — ⁷RIKEN , Wako, Japan

In chiral magnets, the Dzyaloshinskii-Moriya interaction twists the magnetization and leads to a helimagnetic ground state. We use magnetic force microscopy (MFM) to investigate the magnetic long-range order in the near room-temperature helimagnet FeGe with nanoscale spatial resolution. Completely new types of magnetic domain walls are observed, connecting regions with different orientation of the helical structure. Analogous to the much-studied skyrmions, the walls can exhibit a nonzero topological winding number and, hence, possibly give rise to emergent electrodynamics. Our goal is to control the domain wall formation, demonstrating new opportunities for future applications in spintronics.