近日，日本东京大学Shunsuke Fukami团队研究了手性反铁磁体的电相干驱动。该研究于2025年8月21日发表在《科学》杂志上。

在无线电或更高频率下的反铁磁状态的电流驱动仍然具有挑战性。

研究组报道了手性反铁磁锰锡（Mn₃Sn）纳米点样品的全电、千兆赫范围相干驱动。与铁磁体实验结果相比，在亚纳秒范围内实现了多次实验的高相干性和阈值电流对脉冲宽度不敏感，实现了0.1纳秒脉冲在零场下的1000/1000切换。这些特征归因于反铁磁激励的惯性性质。该研究强调了反铁磁自旋电子学在磁性器件操作中结合高速和高效率的潜力。

附：英文原文

Title: Electrical coherent driving of chiral antiferromagnet

Author: Yutaro Takeuchi, Yuma Sato, Yuta Yamane, Ju-Young Yoon, Yukinori Kanno, Tomohiro Uchimura, K. Vihanga De Zoysa, Jiahao Han, Shun Kanai, Jun’ichi Ieda, Hideo Ohno, Shunsuke Fukami

Issue&Volume: 2025-08-21

Abstract: 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.

DOI: ado1611

Source: https://www.science.org/doi/10.1126/science.ado1611