Near- Tc Ferromagnetic Resonance and Damping in FePt -Based Heat-Assisted Magnetic Recording Media

Daniel Richardson; Sidney Katz; J. Wang; Y. K. Takahashi; Kumar Srinivasan; Alan Kalitsov; K. Hono; Antony Ajan; M. Mingzhong

doi:10.1103/PhysRevApplied.10.054046

Near- T_c Ferromagnetic Resonance and Damping in FePt -Based Heat-Assisted Magnetic Recording Media

Daniel Richardson, Sidney Katz, J. Wang, Y. K. Takahashi, Kumar Srinivasan, Alan Kalitsov, K. Hono, Antony Ajan, M. Mingzhong

研究成果: Article › 査読

13 被引用数 (Scopus)

抄録

High-temperature ferromagnetic resonance (FMR) in FePt-based media materials is studied for the first time. The FMR linewidth (ΔH) as a function of temperature (T), field angle (θH), and the volume fraction (x) of carbon in the material is determined, and the effective Gilbert damping constant and the Bloch-Bloembergen relaxation time are estimated. The data suggest that at temperatures 10-45 K below the Curie temperature, two-magnon scattering and spin-flip magnon-electron scattering make comparable contributions to ΔH. With a decrease in T, ΔH increases due to enhancement of the two-magnon scattering. ΔH can be tuned via varying x and shows a maximum at θH≈45 when varying θH.

本文言語	English
論文番号	054046
ジャーナル	Physical Review Applied
巻	10
号	5
DOI	https://doi.org/10.1103/PhysRevApplied.10.054046
出版ステータス	Published - 2018 11月 20
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（全般）

文献へのアクセス

10.1103/PhysRevApplied.10.054046

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引用スタイル

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AU - Richardson, Daniel

AU - Katz, Sidney

AU - Wang, J.

AU - Takahashi, Y. K.

AU - Srinivasan, Kumar

AU - Kalitsov, Alan

AU - Hono, K.

AU - Ajan, Antony

AU - Mingzhong, M.

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