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  Robust metastable skyrmions with tunable size in the chiral magnet FePtMo3N

Sukhanov, A. S., Heinemann, A., Kautzsch, L., Bocarsly, J. D., Wilson, S. D., Felser, C., et al. (2020). Robust metastable skyrmions with tunable size in the chiral magnet FePtMo3N. Physical Review B, 102(14): 140409, pp. 1-5. doi:10.1103/PhysRevB.102.140409.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-604D-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-DF61-1
Genre: Journal Article

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 Creators:
Sukhanov, A. S.1, Author              
Heinemann, A.2, Author
Kautzsch, L.1, Author              
Bocarsly, J. D.2, Author
Wilson, S. D.2, Author
Felser, C.3, 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              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The synthesis of new materials that can host magnetic skyrmions and their thorough experimental and theoretical characterization are essential for future technological applications. The beta-Mn-type compound FePtMo3N is one such novel material that belongs to the chiral space group P4(1)32, where the antisymmetric Dzyaloshinskii-Moriya interaction is allowed due to the absence of inversion symmetry. We report the results of small-angle neutron scattering (SANS) measurements of FePtMo3N and demonstrate that its magnetic ground state is a long-period spin helix with a Curie temperature of 222 K. The magnetic field-induced redistribution of the SANS intensity showed that the helical structure transforms to a lattice of skyrmions at similar to 13 mT at temperatures just below T-C. Our key observation is that the skyrmion state in FePtMo3N is robust against field cooling down to the lowest temperatures. Moreover, once the metastable state is prepared by field cooling, the skyrmion lattice exists even in zero field. Furthermore, we show that the skyrmion size in FePtMo3N exhibits high sensitivity to the sample temperature and can be continuously tuned between 120 and 210 nm. This offers different prospects in the control of topological properties of chiral magnets.

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Language(s): eng - English
 Dates: 2020-10-262020-10-26
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevB.102.140409
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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: 102 (14) Sequence Number: 140409 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008