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MA: Fachverband Magnetismus
MA 29: Skyrmions II
MA 29.5: Vortrag
Mittwoch, 19. März 2025, 16:00–16:15, H20
Edge dislocations in helimagnets as mobile topological defects — •Maurice Colling1, Manuel Zahn1,2, Jan Masell3, and Dennis Meier1 — 1NTNU Norwegian University of Science and Technology, Trondheim, Norway — 2University of Augsburg (UniA), Augsburg, Germany — 3Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Magnetic topological solitons, such as skyrmions and hopfions, represent fertile ground for emergent physical properties with potential applications in spintronics and unconventional computing. In my talk, I will present magnetic edge dislocations as intriguing nano-sized topological textures, which can serve as mobile information carriers. Edge dislocations naturally arise in the helimagnetic background of the B20-type material FeGe, which we study as a model system. Using micromagnetic simulations, we demonstrate how isolated dislocations can be initialized in a track-like geometry and how their movement can be controlled using spin-polarized currents and magnetic fields. Furthermore, we show how pinning sites can be introduced to achieve 'stop-and-go' motion, allowing to translate events (e.g. magnetic field or current pulses) into positional information. One key difference between dislocations and other topological solitons is their relaxation motion which is driven by the system's intrinsic tendency to revert toward the helimagnetic ground state. This feature makes them interesting candidates for sensing and computing applications and low-energy device technologies in general.
Keywords: Topological Solitons; Spintronics; Magnetic Edge Dislocations; Micromagnetic Simulations; Low-Energy Devices