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説明:

Understanding magnetic damping behavior at finite temperatures is crucial for magnetization reversal, especially in heat-assisted magnetic recording (HAMR) media. In this paper, we calculate the intrinsic magnetic damping of L10-FePt, which is the prospective HAMR media, based on the Kamberský torque correlation model and the modified frozen thermal lattice disorder approach. Using the temperature-dependent scattering rate, the magnetic damping showed nonmonotonic behavior and slightly increased with increasing temperature, indicating that the lattice vibration enhances the interband transition around the Fermi level. Comparison of our results with the previous theoretical and experimental works clarified that, because the intrinsic damping of L10-FePt was always enhanced at high temperature, the reduction of the damping around the Curie temperature in the recent experiment emphasizes the importance of extrinsic contributions of damping for HAMR application.

権利情報:

• In Copyright
  

キーワード: First-principles calculations, Lattice dynamics, Magnetization dynamics, Spin-orbit torque

刊行年月日: 2023-09-15

出版者: American Physical Society (APS)

掲載誌:

• Physical Review B (ISSN: 24699969) vol. 108 094426

研究助成金:

• National Institute for Materials Science
• Japan Society for the Promotion of Science JP17H06152
• Japan Society for the Promotion of Science JP20H00299
• Japan Society for the Promotion of Science JP20H02190
• Japan Society for the Promotion of Science JP22H04966
• Research Institute of Electrical Communication, Tohoku University
• CSRN of Osaka University

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5168

公開URL: https://doi.org/10.1103/physrevb.108.094426

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更新時刻: 2024-12-20 15:09:41 +0900

MDRでの公開時刻: 2024-12-20 16:31:37 +0900