Development of giant pure spin current generation technique for energy harvesting.

• Project/Area Number: 16H06929
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Nanomaterials engineering
• Research Institution: Osaka University
• Principal Investigator: Oki Soichiro 大阪大学, 基礎工学研究科, 特任研究員(常勤) (40780838)
• 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: スピントロニクス / ホイスラー合金 / 純スピン流 / スピンカロリトロ二クス / スピンカロリトロニクス

Outline of Final Research Achievements

Heat flow - spin current conversion at the ferromagnetic/nonmagnetic interface in sub-micron scale area is a technology that add value to spintronics devices with low power consumption. To investigate the relationship between electron - spin conversion efficiency and heat - spin conversion efficiency, we applied our high-quality ferromagnetic alloy fabrication techniques in Co-Fe based Heusler alloys, We experimentally clarified the heat - spin conversion efficiencies and correlation between electron - spin conversion efficiency. Higher efficiencies are demonstrated by using single crystal Co2FeSi thin film.