Anomalous spin-orbit torque switching due to field-like torque-assisted domain wall reflection
- Authors
- Yoon, Jungbum; Lee, Seo-Won; Kwon, Jae Hyun; Lee, Jong Min; Son, Jaesung; Qiu, Xuepeng; Lee, Kyung-Jin; Yang, Hyunsoo
- Issue Date
- 4월-2017
- Publisher
- AMER ASSOC ADVANCEMENT SCIENCE
- Citation
- SCIENCE ADVANCES, v.3, no.4
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCIENCE ADVANCES
- Volume
- 3
- Number
- 4
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/84020
- DOI
- 10.1126/sciadv.1603099
- ISSN
- 2375-2548
- Abstract
- Spin-orbit torques (SOTs) allow the electrical control of magnetic states. Current-induced SOT switching of the perpendicular magnetization is of particular technological importance. The SOT consists of damping-like and field-like torques, and understanding the combined effects of these two torque components is required for efficient SOT switching. Previous quasi-static measurements have reported an increased switching probability with the width of current pulses, as predicted considering the damping-like torque alone. We report a decreased switching probability at longer pulse widths, based on time-resolved measurements. Micromagnetic analysis reveals that this anomalous SOT switching results from domain wall reflections at sample edges. The domain wall reflection was found to strongly depend on the field-like torque and its relative sign to the damping-like torque. Our result demonstrates a key role of the field-like torque in deterministic SOT switching and the importance of the sign correlation of the two torque components, which may shed light on the SOT switching mechanism.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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