Evolution of new magnetic materials with ultrahigh coercivity

2020 年度 実施状況報告書

• 研究課題/領域番号: 19K15391
• 研究機関: 京都大学
• 研究代表者: TRINH THANGTHUY 京都大学, 化学研究所, 特定助教 (70764679)
• 研究期間 (年度): 2019-04-01 – 2022-03-31
• キーワード: SmFe12 / Rare Earth / Transition Metal / Magnetic Pinning

研究実績の概要

Ultrafine (Sm,Zr)(Fe,Co,Ti)12 mesoscopic magnetic particles (MMPs) with controllable grain-size and composition have been synthesized. Importantly, appropriate magnetically-hard pinning shells could be introduced to the MMPs, serving as intergranular magnetic pinning boundaries. As a result, the MMPs exhibited ever-high coercivity of 1.6 T. This result is a breakthrough in the development of SmFe12 based permanent magnet materials.

現在までの達成度 (区分)

1: 当初の計画以上に進展している

理由

The research progress well regards the research objective and implemented plan in 2020, as follows:
(1) Controlling microstructure of the Sm(Fe1-xCox)12-yTiy MMPs
(2) Elucidating and understanding microstructure and magnetic properties of the Sm(Fe1-xCox)12-yTiy MMPs.

今後の研究の推進方策

The research is planned as follows:
(1) Further optimization of microstructure of Sm(Fe1-xCox)12-yTiy MMPs,
(2) Fabrication of anisotropic Sm(Fe1-xCox)12-yTiy bulk permanent magnets and
(3) Elucidating and understanding the microstructure and magnetic properties of the Sm(Fe1-xCox)12-yTiy MMPs and the anisotropic bulk permanent magnets.

次年度使用額が生じた理由

Pacifichem 2020 has been rescheduled due to the COVID-19 pandemic

研究成果

• [雑誌論文] Synthesis of Mesoscopic Particles of Multi-Component Rare Earth Permanent Magnet (2021)
  • 著者名/発表者名: T Thuy Trinh, Jungryang Kim, Ryota Sato, Kenshi Matsumoto, Toshiharu Teranishi
  • 雑誌名: Sci. Technol. Adv. Mater. 巻: 22 ページ: 37-54
  • DOI: 10.1080/14686996.2020.1862630
• [学会発表] Chemical Synthesis of (Sm,Zr)(Fe,Co,Ti)12 Magnetic Mesoscopic Particles (2020)
  • 著者名/発表者名: T. T. Trinh, R. Sato, T. Teranishi
  • 学会等名: The 44th Annual Conference on MAGNETICS in Japan
• [学会発表] Magnetism of Pseudobinary SmFe12 Compound (2020)
  • 著者名/発表者名: T. Thuy Trinh, Ryota Sato, Toshiharu Teranishi
  • 学会等名: The 101st CSJ Annual Meeting