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  Observation of Robust Néel Skyrmions in Metallic PtMnGa

Srivastava, A. K., Devi, P., Sharma, A. K., Ma, T., Deniz, H., Meyerheim, H. L., et al. (2019). Observation of Robust Néel Skyrmions in Metallic PtMnGa. Advanced Materials, 1904327, pp. 1-6. doi:10.1002/adma.201904327.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-6E13-B Version Permalink: http://hdl.handle.net/21.11116/0000-0005-6E18-6
Genre: Journal Article

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 Creators:
Srivastava, Abhay K.1, Author
Devi, Parul2, Author              
Sharma, Ankit K.1, Author
Ma, Tianping1, Author
Deniz, Hakan1, Author
Meyerheim, Holger L.1, Author
Felser, Claudia3, Author              
Parkin, Stuart S. P.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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Free keywords: Lorentz transmission electron microscopy, non-centrosymmetric, skyrmions, spintronics
 Abstract: Over the past decade the family of chiral noncollinear spin textures has continued to expand with the observation in metallic compounds of Bloch-like skyrmions in several B20 compounds, and antiskyrmions in a tetragonal inverse Heusler. Néel like skyrmions in bulk crystals with broken inversion symmetry have recently been seen in two distinct nonmetallic compounds, GaV4S8 and VOSe2O5 at low temperatures (below ≈13 K) only. Here, the first observation of bulk Néel skyrmions in a metallic compound PtMnGa and, moreover, at high temperatures up to ≈220 K is reported. Lorentz transmission electron microscopy reveals the chiral Néel character of the skyrmions. A strong variation is reported of the size of the skyrmions on the thickness of the lamella in which they are confined, varying by a factor of 7 as the thickness is varied from ≈90 nm to ≈4 µm. Moreover, the skyrmions are highly robust to in-plane magnetic fields and can be stabilized in a zero magnetic field using suitable field-cooling protocols over a very broad temperature range to as low as 5 K. These properties, together with the possibility of manipulating skyrmions in metallic PtMnGa via current induced spin–orbit torques, make them extremely exciting for future spintronic applications. © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Language(s): eng - English
 Dates: 2019-12-102019-12-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1002/adma.201904327
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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 1904327 Start / End Page: 1 - 6 Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855