Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet.
- Karube K RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan.
- White JS Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
- Morikawa D RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan.
- Dewhurst CD Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France.
- Cubitt R Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France.
- Kikkawa A RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan.
- Yu X RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan.
- Tokunaga Y Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan.
- Arima TH RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan.
- Rønnow HM Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
- Tokura Y RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan.
- Taguchi Y RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan.
- 2018-09-19
Published in:
- Science advances. - 2018
English
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, β-Mn structure-type Co-Zn-Mn alloys were identified as a new class of chiral magnet to host such skyrmion crystal phases, while β-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-equilibrium topological 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 stable well below Tc. The stability of this new disordered 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.
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.1126/sciadv.aar7043
- PMID 30225364
- Persistent URL
- https://folia.unifr.ch/global/documents/239591
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