Electrical coherent driving of chiral antiferromagnet

• 成果类型: Article
• 署名作者: Takeuchi, Yutaro; Sato, Yuma; Yamane, Yuta; Yoon, Ju-Young; Kanno, Yukinori; Uchimura, Tomohiro; De Zoysa, K. Vihanga; Han, Jiahao; Kanai, Shun; Ieda, Jun'ichi; Ohno, Hideo; Fukami, Shunsuke
• 署名单位: Tohoku University; National Institute for Materials Science; National Institute for Materials Science; Tohoku University; Tohoku University; Tohoku University; Tohoku University; Tohoku University; National Institutes for Quantum Science & Technology; Japan Atomic Energy Agency; Tohoku University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9503
• DOI: 10.1126/science.ado1611
• 发表日期: 2025-08-21
• 页码: 830-834
• 关键词: spin-torque; driven

摘要

Electric current driving of antiferromagnetic states at radio or higher frequencies remains challenging to achieve. In this study, we report all-electrical, gigahertz-range coherent driving of chiral antiferromagnet manganese-tin (Mn3Sn) nanodot samples. High coherence in multiple trials and threshold current insensitive to pulse width, in contrast to results observed with ferromagnets, were achieved in subnanosecond range, allowing 1000/1000 switching by 0.1-nanosecond pulses at zero field. These features are attributed to the inertial nature of antiferromagnetic excitations. Our study highlights the potential of antiferromagnetic spintronics to combine high speed and high efficiency in magnetic device operations.