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  Giant enhancement of the skyrmion stability in a chemically strained helimagnet

Sukhanov, A. S., Vir, P., Heinemann, A., Nikitin, S. E., Kriegner, D., Borrmann, H., et al. (2019). Giant enhancement of the skyrmion stability in a chemically strained helimagnet. Physical Review B, 100(18): 180403, pp. 1-5. doi:10.1103/PhysRevB.100.180403.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-4D8C-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-5D4C-F
Genre: Journal Article

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 Creators:
Sukhanov, A. S.1, Author              
Vir, Praveen1, Author              
Heinemann, A.2, Author
Nikitin, S. E.3, Author              
Kriegner, D.1, Author              
Borrmann, H.4, Author              
Shekhar, C.5, Author              
Felser, C.6, Author              
Inosov, D. S.2, Author
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
4Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
5Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
6Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: We employed small-angle neutron scattering to demonstrate that the magnetic skyrmion lattice can be realized in bulk chiral magnets as a thermodynamically stable state at temperatures much lower than the ordering temperature of the material. This is in the regime where temperature fluctuations become completely irrelevant to the formation of the topologically nontrivial magnetic texture. In this attempt we focused on the model helimagnet MnSi, in which the skyrmion lattice was previously well characterized and shown to exist only in a very narrow phase pocket close to the Curie temperature of 29.5 K. We revealed that large uniaxial distortions caused by the crystal-lattice strain in MnSi result in stabilization of the skyrmion lattice in magnetic fields applied perpendicular to the uniaxial strain at temperatures as low as 5 K. To study the bulk chiral magnet subjected to a large uniaxial stress, we have utilized micrometer-sized single-crystalline inclusions of MnSi naturally found inside single crystals of the nonmagnetic material Mn11Si19. The reciprocal-space imaging allowed us to unambiguously identify the stabilization of the skyrmion state over the competing conical spin spiral.

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Language(s): eng - English
 Dates: 2019-11-112019-11-11
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 100 (18) Sequence Number: 180403 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008