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Article Dans Une Revue Journal of Physics D: Applied Physics Année : 2021

Ferrimagnetic–ferromagnetic phase transition in Mn 4 N films favored by non-magnetic In doping

Tomohiro Yasuda
  • Fonction : Auteur
Taro Komori
Haruka Mitarai
  • Fonction : Auteur
Syuta Honda
Laurent Vila
Kenta Amemiya
Takashi Suemasu

Résumé

Abstract The ferrimagnet Mn 4 N forms a family of compounds useful in spintronics. In a compound comprising non-magnetic and magnetic elements, one basically expects the compound to become ferromagnetic when the proportion of the magnetic element increases. Conversely, one does not expect ferromagnetism when the proportion of the non-magnetic element increases. Surprisingly, Mn 4 N becomes ferromagnetic at room temperature when the Mn content is decreased by the addition of In atoms, a non-magnetic element. X-ray magnetic circular dichroism measurement reveals that the magnetic moment of Mn atoms at face-centered sites, Mn(II), reverses between x = 0.15 and 0.27 and aligns parallel to that of Mn atoms at corner sites, Mn(I), at x = 0.27 and 0.41. The sign of the anomalous Hall resistivity also changes between x = 0.15 and 0.27 in accordance with the reversal of the magnetic moment of the Mn(II) atoms. These results can be interpreted using first-principles calculations, showing that the magnetic moment of Mn(II) sites which are the nearest neighbors to the In atom align to that of Mn(I) sites.
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Dates et versions

hal-03768231 , version 1 (02-09-2022)

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Citer

Tomohiro Yasuda, Taro Komori, Haruka Mitarai, Syuta Honda, Sambit Ghosh, et al.. Ferrimagnetic–ferromagnetic phase transition in Mn 4 N films favored by non-magnetic In doping. Journal of Physics D: Applied Physics, 2021, 55 (11), pp.115003. ⟨10.1088/1361-6463/ac3e90⟩. ⟨hal-03768231⟩
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