Controlling the helicity of magnetic skyrmions in a β -Mn-type high-temperature chiral magnet

K. Karube, K. Shibata, J. S. White, T. Koretsune, X. Z. Yu, Y. Tokunaga, H. M. Rønnow, R. Arita, T. Arima, Y. Tokura, Y. Taguchi

研究成果: Article査読

14 被引用数 (Scopus)

抄録

Magnetic helices and skyrmions in noncentrosymmetric magnets are representative examples of chiral spin textures in solids. Their spin swirling direction, often termed as the magnetic helicity and defined as either left handed or right handed, is uniquely determined by the Dzyaloshinskii-Moriya interaction (DMI) in fixed chirality host crystals. Thus far, there have been relatively few investigations of the DMI in metallic magnets as compared with insulating counterparts. Here, we focus on the metallic magnets Co8-xFexZn8Mn4 (0≤x≤4.5) with a β-Mn-type chiral structure and find that, as x varies under a fixed crystal chirality, a reversal of magnetic helicity occurs at xc∼2.7. This experimental result is supported by a theory based on first-principles electronic structure calculations, demonstrating the DMI to depend critically on the electron band filling. Thus by composition tuning our work shows the sign change of the DMI with respect to a fixed crystal chirality to be a universal feature of metallic chiral magnets.

本文言語English
論文番号155120
ジャーナルPhysical Review B
98
15
DOI
出版ステータスPublished - 2018 10 11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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