The Japan Society of Applied Physics

2023 International Conference on Solid State Devices and Materials

2023 International Conference on Solid State Devices and Materials

2023年9月5日 〜 2023年10月31日
Nagoya Congress Center

11:30 〜 11:45

[B-4-03] Annealing temperature effects on spin orbit torque in YPtBi topological semimetal and Co/Pt perpendicular magnetization multilayers

○Sho Kagami1, Takanori Shirokura1, Pham Nam Hai1 (1. Tokyo Institute of Technology (Japan))

https://doi.org/10.7567/SSDM.2023.B-4-03

We evaluated the annealing temperature effects on spin orbit torque in YPtBi/CoPt heterojunction, and compared with that in W/CoPt heterojunction. We found that the spin orbit torque in YPtBi/CoPt is stable up to 300°C of annealing temperature, while that in W/CoPt is stable up to only 200°C. Our results show that YPtBi is superior to W in both spin Hall angle and thermal stability.