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  Anomalous Hall Effect in Epitaxial Thin Films of the Hexagonal Heusler MnPtGa Noncollinear Hard Magnet

Ibarra, R., Lesne, E., Sabir, B., Gayles, J., Felser, C., & Markou, A. (2022). Anomalous Hall Effect in Epitaxial Thin Films of the Hexagonal Heusler MnPtGa Noncollinear Hard Magnet. Advanced Materials Interfaces, 9(36): 2201562, pp. 1-9. doi:10.1002/admi.202201562.

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Ibarra, Rebeca1, Autor           
Lesne, Edouard1, Autor           
Sabir, Bushra2, Autor
Gayles, Jacob2, Autor
Felser, Claudia3, Autor           
Markou, Anastasios1, Autor           
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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 Zusammenfassung: Materials hosting noncollinear magnetic ordering and sizeable spin-orbit coupling can manifest perpendicular magnetic anisotropy and a Berry curvature-driven intrinsic anomalous Hall effect. In this work, the structural, magnetic, and magnetotransport properties of crystalline hexagonal Heusler MnPtGa epitaxial thin films are reported. The centrosymmetric MnPtGa films (P6(3)/mmc space group) crystallize with a preferred c-axis (0001) crystal orientation. Along this crystallographic direction, the MnPtGa films exhibit preferential perpendicular magnetic anisotropy, below the Curie temperature T-C = 263 K, with a large effective uniaxial magnetic anisotropy K-eff = 0.735 MJ m(-3), at 150 K. In addition, the MnPtGa system undergoes a thermally induced spin reorientation transition below T-sr = 160 K, which marks the onset of a noncollinear spin-canted state. The anomalous Hall conductivity (AHC) of MnPtGa films exhibits a nonmonotonic behavior as a function of temperature, which changes sign at T* = 110 K. Concurrently with the reported unusual dependence of the AHC on the longitudinal conductivity in MnPtGa crystalline thin films, these findings strongly suggest an anomalous Hall effect of intrinsic origin, driven by a momentum-space Berry curvature mechanism, as supported by first-principle calculations.

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Sprache(n): eng - English
 Datum: 2022-11-092022-11-09
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: ISI: 000880378600001
DOI: 10.1002/admi.202201562
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Titel: Advanced Materials Interfaces
  Kurztitel : Adv. Mater. Interfaces
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Weinheim : Wiley-VCH
Seiten: - Band / Heft: 9 (36) Artikelnummer: 2201562 Start- / Endseite: 1 - 9 Identifikator: ISSN: 2196-7350
CoNE: https://pure.mpg.de/cone/journals/resource/2196-7350