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説明:

The current-induced spin-orbit torque-based devices for magnetization switching commonly relied on the 4d and 5d heavy metals owing to their strong spin-orbit coupling (SOC) to produce large spin current via spin Hall effect (SHE). Here we present the sizable SHE in CrN, a light element-based system, and demonstrate the current-induced magnetization switching in the adjacent ferromagnetic layer [Co(0.35nm)/Pt(0.3nm)]3, which exhibits perpendicular magnetic anisotropy. We found the switching current density of 2.6MA/cm2.The first principles calculation gives the spin Hall conductivity (SHC) ∼ 120 S/cm due to intrinsic spin Berry curvature arising from SOC induced band splitting near Fermi energy. The theoretically calculated intrinsic SHC is close to the experimental SHC extracted from second harmonic Hall measurement. We estimated spin Hall angle (θSH) ∼0.09, demonstrating efficient charge-to-spin conversion in CrN system.

権利情報:

• In Copyright
  

  ©2025 American Physical Society.

キーワード: Light element, Spin-orbit torque

刊行年月日: 2025-07-25

出版者: American Physical Society (APS)

掲載誌:

• Physical Review B (ISSN: 24699950) vol. 112 issue. 3 035166

研究助成金:

• Japan Society for the Promotion of Science 23K22803
• Tohoku University

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5763

公開URL: https://doi.org/10.1103/rzhb-6ytx

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更新時刻: 2025-09-16 12:30:43 +0900

MDRでの公開時刻: 2025-09-16 12:19:40 +0900