Magnetic damping control of ferromagnetic thin films with negative spin polarization and development of highly efficient spin-current generator

2014 Fiscal Year Final Research Report

• Project/Area Number: 24710154
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Microdevices/Nanodevices
• Research Institution: Fukushima National College of Technology
• Principal Investigator: ISOGAMI Shinji 福島工業高等専門学校, その他部局等, 准教授 (10586853)
• Research Collaborator: TSUNODA Masakiyo 東北大学, 大学院工学研究科, 准教授 (80250702) ; OOGANE Mikihiko 東北大学, 大学院工学研究科, 准教授 (50396454) ; SAKUMA Akimasa 東北大学, 大学院工学研究科, 教授 (30361124)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 窒化鉄 / スピン流 / スピンポンピング / 磁気緩和

Outline of Final Research Achievements

Highly efficient spin-current generator was developed using Fe4N thin films with negative spin polarization. The high quality Fe4N/Pt bilayer films were fabricated by the reactive sputtering with Ar and N2 gas mixture during thermal treatment using the focused IR heating system. The electromotive force due to inverse spin-Hall effect generated by spin-pumping from the Fe4N films exhibited one order larger value, compared with the NiFe conventional films. The results implied that our developed Fe4N/Pt systems provided highly spin-current generator.

Free Research Field

磁性薄膜材料