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Experimental observation of chiral magnetic bobbers in B20-type FeGe
Zheng, Fengshan1,2; Rybakov, Filipp N.3,4,5; Borisov, Aleksandr B.4,5; Song, Dongsheng6; Wang, Shasha7,8,9; Li, Zi-An10; Du, Haifeng7,8,9; Kiselev, Nikolai S.11,12; Caron, Jan1,2; Kovacs, Andras1,2; Tian, Mingliang7,8,9; Zhang, Yuheng7,8,9; Bluegel, Stefan11,12; Dunin-Borkowski, Rafal E.1,2

Chiral magnetic skyrmions(1,2) are nanoscale vortex-like spin textures that form in the presence of an applied magnetic field in ferromagnets that support the Dzyaloshinskii-Moriya interaction (DMI) because of strong spin-orbit coupling and broken inversion symmetry of the crystal(3,4). In sharp contrast to other systems(5,6) that allow for the formation of a variety of two-dimensional (2D) skyrmions, in chiral magnets the presence of the DMI commonly prevents the stability and coexistence of topological excitations of different types(7). Recently, a new type of localized particle-like object-the chiral bobber (ChB)-was predicted theoretically in such materials(8). However, its existence has not yet been verified experimentally. Here, we report the direct observation of ChBs in thin films of B20-type FeGe by means of quantitative off-axis electron holography (EH). We identify the part of the temperature-magnetic field phase diagram in which ChBs exist and distinguish two mechanisms for their nucleation. Furthermore, we show that ChBs are able to coexist with skyrmions over a wide range of parameters, which suggests their possible practical applications in novel magnetic solid-state memory devices, in which a stream of binary data bits can be encoded by a sequence of skyrmions and bobbers.

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Funding ProjectKey Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH009] ; Natural Science Foundation of China[51622105] ; Natural Science Foundation of China[11474290] ; Youth Innovation Promotion Association CAS[2015267] ; National Key RAMP;D Program of China[2017YFA0303201] ; Chinese Academy of Science[KJZD-SW-M01] ; Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology[2016FXCX001] ; European Union through the Marie Curie Initial Training Network SIMDALEE2 ; European Research Council under the European Union[320832] ; Swedish Research Council[642-2013-7837]
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000434715700012
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorDu, Haifeng; Kiselev, Nikolai S.
Affiliation1.Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, Julich, Germany
2.Forschungszentrum Julich, Peter Grunberg Inst, Julich, Germany
3.KTH Royal Inst Technol, Dept Phys, Stockholm, Sweden
4.Russian Acad Sci, Ural Branch, MN Miheev Inst Met Phys, Ekaterinburg, Russia
5.Ural Fed Univ, Ekaterinburg, Russia
6.Tsinghua Univ, Natl Ctr Electron Microscopy Beijing, Sch Mat Sci & Engn, Beijing, Peoples R China
7.Chinese Acad Sci, Anhui Key Lab Condensed Matter Phys Extreme Condi, High Magnet Field Lab, Hefei, Anhui, Peoples R China
8.Univ Sci & Technol China, Chinese Acad Sci, Hefei, Anhui, Peoples R China
9.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing, Jiangsu, Peoples R China
10.Chinese Acad Sci, Inst Phys, Beijing, Peoples R China
11.Forschungszentrum Julich, Peter Grunberg Inst & Inst Adv Simulat, Julich, Germany
12.JARA, Julich, Germany
Recommended Citation
GB/T 7714
Zheng, Fengshan,Rybakov, Filipp N.,Borisov, Aleksandr B.,et al. Experimental observation of chiral magnetic bobbers in B20-type FeGe[J]. NATURE NANOTECHNOLOGY,2018,13(6):451-+.
APA Zheng, Fengshan.,Rybakov, Filipp N..,Borisov, Aleksandr B..,Song, Dongsheng.,Wang, Shasha.,...&Dunin-Borkowski, Rafal E..(2018).Experimental observation of chiral magnetic bobbers in B20-type FeGe.NATURE NANOTECHNOLOGY,13(6),451-+.
MLA Zheng, Fengshan,et al."Experimental observation of chiral magnetic bobbers in B20-type FeGe".NATURE NANOTECHNOLOGY 13.6(2018):451-+.
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