Electrical coherent driving of chiral antiferromagnet
- 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
2025-08-21
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 (Mn 3 Sn) 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.