2022 Fiscal Year Annual Research Report
Laser-induced deterministic magnetization switching for next-generation magnetic recording
| Project/Area Number |
21K14521
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
王 建 国立研究開発法人産業技術総合研究所, 材料・化学領域, 研究員 (80792069)
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| Project Period (FY) |
2021-04-01 – 2023-03-31
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| Keywords | エネルギーアシスト磁化反転 / FePt媒体 / 光誘起磁化反転 / 熱流スピン流変換 / 超高密度磁気記録 |
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| Outline of Annual Research Achievements |
The endless explosion of digital data universe accompanies with “Society 5.0”is now pushing the world toward a data storage capacity crisis. Moreover, the energy consumption of data storage devices is increasing exponentially, which can cause serious energy and environmental issues in the near future. Therefore, revolution of current data storage technologies is urgently desired.
In current work, a new magnetic recording technique was designed and developed for the next-generation magnetic recording technology with high recording areal density, ultrafast process speed, and low energy consumption. I have experimentally demonstrated that by utilizing the interconversion between heat (phononic), light (photonic), and spin (spintronic), the magnetization reversal in the magnetic hard FePt nanogranular media can be enhanced and ultrafast manipulated by femtosecond laser pulses. The results of this interdisciplinary research work provide the first experimental demonstration of the application of the magnetothermal effect for magnetization reversal. The unique physical phenomenon and the mechanism behind are believed will attract intensive academic interests. Meanwhile, further optimization of this work will open a new pathway for the laser-induced deterministic magnetization switching in magnetically hard recording media which will gain great attentions from the magnetic recording industry.
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| Remarks |
There are two more academic journal papers under peer-reviewing.
The results will be presented in two academic conference (one domestics, one international) which are waiting for the notification.
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