Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet

Kosuke Karube, Jonathan S. White, Daisuke Morikawa, Charles D. Dewhurst, Robert Cubitt, Akiko Kikkawa, Xiuzhen Yu, Yusuke Tokunaga, Taka Hisa Arima, Henrik M. Rønnow, Yoshinori Tokura, Yasujiro Taguchi

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Magnetic skyrmions are vortex-like topological spin textures often observed to form a triangular-lattice skyrmion crystal in structurally chiral magnets with the Dzyaloshinskii-Moriya interaction. Recently, b-Mn structure-type Co-Zn-Mn alloys were identified as a new class of chiral magnet to host such skyrmion crystal phases, while b-Mn itself is known as hosting an elemental geometrically frustrated spin liquid.We report the intermediate composition system Co7Zn7Mn6 to be a unique host of two disconnected, thermal-equilibriumtopological skyrmion phases; one is a conventional skyrmion crystal phase stabilized by thermal fluctuations and restricted to exist just below the magnetic transition temperature Tc, and the other is a novel three-dimensionally disordered skyrmion phase that is stablewell belowTc. The stability of this newdisordered skyrmion phase is due to a cooperative interplay between the chiral magnetism with the Dzyaloshinskii-Moriya interaction and the frustrated magnetism inherent to β-Mn.

Original languageEnglish
Article numbereaar7043
JournalScience Advances
Volume4
Issue number9
DOIs
Publication statusPublished - 2018 Sep 14

ASJC Scopus subject areas

  • General

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