Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 12: Superconductivity – Topological Defects in Superconductors and Magnets (joint session TT/MA)
MA 12.3: Vortrag
Montag, 12. März 2018, 15:30–15:45, HFT-FT 101
Mechanisms of nucleation of chiral bobbers in helical magnets — Fengshan Zheng1,2, •Filipp N. Rybakov3, Aleksandr B. Borisov4, Dongsheng Song5, Shasha Wang6,7, Zi-An Li8, Haifeng Du6,7, Nikolai S. Kiselev2, Jan Caron1,2, András Kovács1,2, Mingliang Tian6,7, Yuheng Zhang6,7, Stefan Blügel2, and Rafal E. Dunin-Borkowski1,2 — 1Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, Germany — 2Peter Grünberg Institut, Forschungszentrum Jülich, Germany — 3Department of Physics, KTH-Royal Institute of Technology, Stockholm, Sweden — 4M.N. Miheev Institute of Metal Physics, Ekaterinburg, Russia — 5National Center for Electron Microscopy in Beijing, Tsinghua University, China — 6High Magnetic Field Laboratory, Hefei, China — 7Collaborative Innovation Center of Advanced Microstructures, Nanjing University, China — 8Institute of Physics, Beijing, China
Magnetic chiral bobbers are stable particlelike states that represent a skyrmion texture combined with Bloch point [1]. Recently they were discovered experimentally in B20-type FeGe compound [2]. Here we present the detailed description on different mechanisms of nucleation of chiral bobbers which were revealed theoretically and then confirmed in experiments with FeGe specimens. The discussed mechanisms represent general phenomena and can be applied to a variety of other chiral magnetic compounds.
F.N. Rybakov et al. PRL 115, 117201 (2015).
F. Zheng et al. arXiv:1706.04654 (2017).