Deformation of Topologically-Protected Supercooled Skyrmions in a Thin Plate of Chiral Magnet Co8Zn8Mn4

Daisuke Morikawa, Xiuzhen Yu, Kosuke Karube, Yusuke Tokunaga, Yasujiro Taguchi, Taka hisa Arima, Yoshinori Tokura

研究成果: Article査読

30 被引用数 (Scopus)

抄録

Magnetic skyrmions in Co8Zn8Mn4 thin plates are observed to deform in a metastable state prepared in a magnetic-field-cooling process by way of the thermal-equilibrium skyrmion phase. In cooling, the disk-shape skyrmions change to bar- or L-shaped elongated form, whereas the skyrmion density is nearly conserved. The deformation of the skyrmions in the supercooled metastable phase is observed irrespective of the crystallographic orientation of the thin plate, whereas the elongation direction nearly aligns along the magnetic easy axis. It is proposed that the deformation should be induced by a large increase in magnetic modulation wavenumber when decreasing the temperature, whereas the topological protection of the skyrmions keeps the averaged skyrmion density constant.

本文言語English
ページ(範囲)1637-1641
ページ数5
ジャーナルNano Letters
17
3
DOI
出版ステータスPublished - 2017 3月 8
外部発表はい

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 機械工学

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