Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102012
Title: Experimental observation of chiral magnetic bobbers in B20-type FeGe
Authors: Zheng, F.
Rybakov, F. N.
Borisov, A. B.
Song, D.
Wang, S.
Li, Z. -A.
Du, H.
Kiselev, N. S.
Caron, J.
Kovács, A.
Tian, M.
Zhang, Y.
Blügel, S.
Dunin-Borkowski, R. E.
Issue Date: 2018
Publisher: Nature Publishing Group
Citation: Experimental observation of chiral magnetic bobbers in B20-type FeGe / F. Zheng, F. N. Rybakov, A. B. Borisov, et al. — DOI 10.1038/s41565-018-0093-3 // Nature Nanotechnology. — 2018. — Vol. 13. — Iss. 6. — P. 451-455.
Abstract: 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. © 2018 The Author(s).
Keywords: CRYSTAL SYMMETRY
ELECTRON HOLOGRAPHY
GERMANIUM COMPOUNDS
IRON COMPOUNDS
MAGNETIC FIELDS
MAGNETS
NANOMAGNETICS
TEXTURES
APPLIED MAGNETIC FIELDS
DIRECT OBSERVATIONS
DZYALOSHINSKII-MORIYA INTERACTION
OFF-AXIS ELECTRON HOLOGRAPHY
SPIN-ORBIT COUPLINGS
TEMPERATURE-MAGNETIC FIELD PHASE DIAGRAM
TOPOLOGICAL EXCITATIONS
TWO DIMENSIONAL (2 D)
BORON COMPOUNDS
GERMANIUM
IRON
MAGNETIC NANOPARTICLE
ARTICLE
CHIRALITY
CRYSTAL
MAGNETIC FIELD
MOLECULAR INTERACTION
MOLECULAR STABILITY
SOLID STATE
TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY
URI: http://hdl.handle.net/10995/102012
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85045089631
PURE ID: 7422934
8b3fe979-8807-4e01-8b35-085e3f0b8fbc
ISSN: 17483387
DOI: 10.1038/s41565-018-0093-3
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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