Experimental study on spin-vorticity conversion of spin hydrodynamic generation

• Project/Area Number: 16H07437
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Ochanomizu University
• Principal Investigator: Takahashi Ryo お茶の水女子大学, 基幹研究院, 助教 (30782023)
• Project Period (FY): 2016-08-26 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: スピン流 / 流体力学 / 流体 / スピントロニクス / 流体工学 / スピンエレクトロニクス

Outline of Final Research Achievements

Spin hydrodynamic generation (SHDG) is generation of spin currents from fluid mechanical motion. The SHDG stems from a direct interaction between mechanical rotation and electron spins, called spin-rotation coupling. Especially in a fluid, vorticity, local rotation in a fluid, can be utilized as a source of the mechanical spin-current generation. In this study, we performed the SHDG measurement in a laminar flow, which is realized even in a micro or nano scale. By comparing results of the current study of the laminar-flow SHDG with that of the conventional study of turbulent one, we clarified SHDG’s properties especially due to the spin-rotation coupling. The results indicate the applicability of the SHDG to micro or nano scale physics, including spin-conversion physics by using the spin currents.

Research Products

• [Journal Article] Fabrication and magnetic control of Y3Fe5O12 cantilevers (2017)
  • Author(s): YJ. Seo, K. Harii, R. Takahashi, H. Chudo, K. Oyanagi, Z. Qiu, T. Ono, Y. Shiomi, and E. Saitoh,
  • Journal Title: Applied Physics Letters Volume: 110 Issue: 13 Pages: 132409-132409
  • DOI: 10.1063/1.4979553
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Observation of spin hydrodynamic generation effect (2016)
  • Author(s): TAKAHASHI Ryo
  • Journal Title: Nano-Spin Conversion Science Research Highlights Volume: 2 Pages: 14-14
  • Open Access
• [Journal Article] Fluid-mechanical Spin-current Generation (2016)
  • Author(s): TAKAHASHI Ryo
  • Journal Title: IMR KINKEN Research Highlights 2016 Volume: - Pages: 28-28
  • Open Access
• [Presentation] 層流におけるスピン流体発電現象の実験 (2017)
  • Author(s): 髙橋 遼・針井 一哉・小野 正雄・中堂 博之・松尾 衛・前川 禎通・齊藤 英治
  • Organizer: 日本物理学会2017年春季大会
  • Place of Presentation: 大阪
  • Year and Date: 2017-03-17
• [Presentation] Experiment of laminar-flow spin hydrodynamic generation effect (2017)
  • Author(s): TAKAHASHI Ryo, HARII Kazuya, ONO Masao, CHUDO Hiroyuki, MATSUO Mamoru, MAEKAWA Sadamichi, SAITOH Eiji
  • Organizer: 平成28年度「ナノスピン変換科学」年次報告会
  • Place of Presentation: 東京
  • Year and Date: 2017-03-02
• [Presentation] Spin-hydrodynamic Conversion Effect (2016)
  • Author(s): TAKAHASHI Ryo, HARII Kazuya, MATSUO Mamoru, MAEKAWA Sadamichi, SAITOH Eiji
  • Organizer: International Workshop on Nano Spin Conversion Science & Quantum Spin Dynamics
  • Place of Presentation: 東京
  • Year and Date: 2016-10-12
  • Int'l Joint Research
• [Presentation] Spin hydrodynamic generation effect (2016)
  • Author(s): Takahashi Ryo
  • Organizer: 68th ASRC Colloquium
  • Place of Presentation: 茨城
  • Invited