Magnetization reversal by controlling a perpendicular magnetic layer / semiconductor interface

2014 Fiscal Year Final Research Report

• Project/Area Number: 25600011
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: Tohoku University
• Principal Investigator: KOHDA Makoto 東北大学, 工学(系)研究科(研究院), 准教授 (00420000)
• Co-Investigator(Renkei-kenkyūsha): NITTA Junsaku 東北大学, 大学院工学研究科, 教授 (00393778)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: スピン軌道相互作用 / Co/Pt / スピンホール効果 / 磁化反転 / 垂直磁気異方性

Outline of Final Research Achievements

Spin orbit interaction in Pt/Co/AlO is widely debated throughout reported literature with causes varying between the Rashba and spin Hall effect and measured strengths varying up to 2 orders of magnitude. To resolve the inconsistency, films of varying interlayer thicknesses as well as material compositions were fabricated, measured and corresponded to the associated spin orbit interaction origin based on theory. We confirmed the control of spin orbit torque by changing the thickness of Pt and Co layers. The measurement method of the present experiment addresses the errors associated with previous methods due to heating.

Free Research Field

スピントロニクス