期刊
SCIENCE
卷 366, 期 6469, 页码 1125-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aav8076
关键词
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资金
- SpOT-LITE program (A*STAR grant) through RIE2020 funds [A18A6b0057]
- National Research Foundation (NRF), Prime Minister's Office, Singapore, under its Competitive Research Programme (CRP award) [NRF-CRP12-201301]
- National Research Foundation of Korea [NRF-015M3D1A1070465, 2017R1A2B2006119]
- KIST Institutional Program [2V05750]
- Fundamental Research Funds for the Central Universities [82232016]
- National Research Foundation of Korea [2017R1A2B2006119] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Widespread applications of magnetic devices require an efficient means to manipulate the local magnetization. One mechanism is the electrical spin-transfer torque associated with electron-mediated spin currents; however, this suffers from substantial energy dissipation caused by Joule heating. We experimentally demonstrated an alternative approach based on magnon currents and achieved magnon-torque-induced magnetization switching in Bi2Se3/antiferromagnetic insulator NiO/ferromagnet devices at room temperature. The magnon currents carry spin angular momentum efficiently without involving moving electrons through a 25-nanometer-thick NiO layer. The magnon torque is sufficient to control the magnetization, which is comparable with previously observed electrical spin torque ratios. This research, which is relevant to the energy-efficient control of spintronic devices, will invigorate magnon-based memory and logic devices.
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