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  Noncollinear magnetic order in epitaxial thin films of the centrosymmetric MnPtGa hard magnet

Ibarra, R., Lesne, E., Ouladdiaf, B., Beauvois, K., Sukhanov, A., Wawrzyńczak, R., et al. (2022). Noncollinear magnetic order in epitaxial thin films of the centrosymmetric MnPtGa hard magnet. Applied Physics Letters, 120(17): 172403, pp. 1-5. doi:10.1063/5.0090009.

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 Creators:
Ibarra, R.1, Author           
Lesne, E.1, Author           
Ouladdiaf, B.2, Author
Beauvois, K.2, Author
Sukhanov, A.S.2, Author
Wawrzyńczak, R.1, Author           
Schnelle, W.3, Author           
Devishvili, A.2, Author
Inosov, D.S.2, Author
Felser, C.4, Author           
Markou, A.1, Author           
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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Free keywords: Alumina; Aluminum oxide; Antiferromagnetism; Crystallography; Ground state; Magnetic anisotropy; Magnetic moments; Neutron diffraction; Platinum alloys; Single crystals; Textures; Thin films, Basal planes; Basal-planes; Centrosymmetric; Epitaxial thin films; Exotic properties; Hard magnets; Magnetic orders; Magnetic system; Noncollinear; Spin-canted state, Ternary alloys
 Abstract: Magnetic systems exhibiting spin-canted states have garnered much attention recently for their promising rich exotic properties driven by the real-space spin textures and competing magnetic orders. In this study, we present the structural and magnetic properties of hexagonal 60 nm MnPtGa epitaxial thin films grown by magnetron sputtering on Al2O3(0001) single-crystalline substrates. The MnPtGa film crystallizes in the centrosymmetric P63/mmc (No. 194) space group, showing perpendicular magnetic anisotropy along the c-axis, with a Curie temperature TC = 263 K. In addition, the MnPtGa film undergoes a spin reorientation transition at Tsr = 160 K. We investigated the MnPtGa magnetic ground states using single-crystal neutron diffraction. A structurally forbidden (001) magnetic Bragg reflection emerges below Tsr, indicating the existence of a spin-canted state, where the magnetic moments align ferromagnetically perpendicular to the basal plane, and a non-zero in-plane component exhibits an antiferromagnetic ordering along the c-axis. At 2 K, the refined magnetic moments of Mn are μz = 4.2(4) μB and μx = 1.5(3) μB, projected onto the c-axis and basal plane, respectively. Hence, we determined a 20° Mn spin canting angle off from the c-axis. © 2022 Author(s).

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Language(s): eng - English
 Dates: 2022-04-272022-04-27
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1063/5.0090009
 Degree: -

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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 120 (17) Sequence Number: 172403 Start / End Page: 1 - 5 Identifier: ISSN: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223