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A new class of chiral materials hosting magnetic skyrmions beyond room temperature

Author

Listed:
  • Y. Tokunaga

    (RIKEN Center for Emergent Matter Science (CEMS)
    Present address: Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan.)

  • X. Z. Yu

    (RIKEN Center for Emergent Matter Science (CEMS))

  • J. S. White

    (Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute)

  • H. M. Rønnow

    (RIKEN Center for Emergent Matter Science (CEMS)
    Laboratory for Quantum Magnetism (LQM), École Polytechnique Fédérale de Lausanne (EPFL))

  • D. Morikawa

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Y. Taguchi

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Y. Tokura

    (RIKEN Center for Emergent Matter Science (CEMS)
    University of Tokyo)

Abstract

Skyrmions, topologically protected vortex-like nanometric spin textures in magnets, have been attracting increasing attention for emergent electromagnetic responses and possible technological applications for spintronics. In particular, metallic magnets with chiral and cubic/tetragonal crystal structure may have high potential to host skyrmions that can be driven by low electrical current excitation. However, experimental observations of skyrmions have been limited to below room temperature for the metallic chiral magnets, specifically for the MnSi-type B20 compounds. Towards technological applications, transcending this limitation is crucial. Here we demonstrate the formation of skyrmions with unique spin helicity both at and above room temperature in a family of cubic chiral magnets: β-Mn-type Co-Zn-Mn alloys with a different chiral space group from that of B20 compounds. Lorentz transmission electron microscopy, magnetization and small-angle neutron scattering measurements unambiguously reveal formation of a skyrmion crystal under application of a magnetic field in both thin-plate and bulk forms.

Suggested Citation

  • Y. Tokunaga & X. Z. Yu & J. S. White & H. M. Rønnow & D. Morikawa & Y. Taguchi & Y. Tokura, 2015. "A new class of chiral materials hosting magnetic skyrmions beyond room temperature," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8638
    DOI: 10.1038/ncomms8638
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    Cited by:

    1. Rina Takagi & Naofumi Matsuyama & Victor Ukleev & Le Yu & Jonathan S. White & Sonia Francoual & José R. L. Mardegan & Satoru Hayami & Hiraku Saito & Koji Kaneko & Kazuki Ohishi & Yoshichika Ōnuki & Ta, 2022. "Square and rhombic lattices of magnetic skyrmions in a centrosymmetric binary compound," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Licong Peng & Kosuke Karube & Yasujiro Taguchi & Naoto Nagaosa & Yoshinori Tokura & Xiuzhen Yu, 2021. "Dynamic transition of current-driven single-skyrmion motion in a room-temperature chiral-lattice magnet," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    3. Deepak Singh & Yukako Fujishiro & Satoru Hayami & Samuel H. Moody & Takuya Nomoto & Priya R. Baral & Victor Ukleev & Robert Cubitt & Nina-Juliane Steinke & Dariusz J. Gawryluk & Ekaterina Pomjakushina, 2023. "Transition between distinct hybrid skyrmion textures through their hexagonal-to-square crystal transformation in a polar magnet," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    4. M. T. Birch & D. Cortés-Ortuño & K. Litzius & S. Wintz & F. Schulz & M. Weigand & A. Štefančič & D. A. Mayoh & G. Balakrishnan & P. D. Hatton & G. Schütz, 2022. "Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room temperature nanowire," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    5. Weiwei Wang & Dongsheng Song & Wensen Wei & Pengfei Nan & Shilei Zhang & Binghui Ge & Mingliang Tian & Jiadong Zang & Haifeng Du, 2022. "Electrical manipulation of skyrmions in a chiral magnet," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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