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Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Magnetism Poster A

MA 15.15: Poster

Dienstag, 2. April 2019, 10:00–13:00, Poster E

Novel Topological Spin Textures in Helimagnetic FeGe — •Erik Lysne1,2, Mariia Stepanova1,2, Peggy Schoenherr3, Jan Müller4, Laura Köhler5, Achim Rosch4, Naoya Kanazawa6, Yoshinori Tokura6,7, Markus Garst4,5, and Dennis Meier1,21NTNU, 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.

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