Near- Tc Ferromagnetic Resonance and Damping in FePt -Based Heat-Assisted Magnetic Recording Media
| Autor: | Yukiko Takahashi, Jincheng Wang, Mingzhong Wu, Antony Ajan, Daniel Richardson, Sidney Katz, Alan Kalitsov, Kumar Srinivasan, Kazuhiro Hono |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Condensed matter physics Condensed Matter::Other Scattering General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ferromagnetic resonance Condensed Matter::Materials Science Magnetization Laser linewidth Heat-assisted magnetic recording 0103 physical sciences Magnetic damping Curie temperature Condensed Matter::Strongly Correlated Electrons Thin film 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Applied. 10 |
| ISSN: | 2331-7019 |
| Popis: | Heat-assisted magnetic recording (HAMR) employs a laser to heat the recording medium nearly to its Curie temperature ${T}_{C}$, to ease magnetization switching. HAMR hard drives have been promised for the near future, yet an understanding of magnetic damping in HAMR media at such temperatures has not been realized. This study of the near-${T}_{C}$ damping properties of FePt thin films on MgO through ferromagnetic resonance (FMR) suggests that just below ${T}_{C}$, two-magnon scattering and spin-flip magnon-electron scattering make comparable contributions to the FMR linewidth, while at lower temperatures two-magnon scattering dominates. |
| Databáze: | OpenAIRE |
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