Tuning magnetic properties of a Weyl semimetal with low current density

Recently, Co₃Sn₂S₂ was proved to be a magnetic Weyl semimetal, which may serve as an ideal platform to realize chiral magnetic effects and quantum anomalous Hall effect. In a perfect quantum anomalous Hall state, theoretical works have predicted that Co₃Sn₂S₂ has a larger domain-wall moving velocity and a smaller field threshold to drive domain-wall motion than conventional metals. This feature is highly attractive for energy-efficient and high-performance spintronic devices, such as magnetic domain-wall racetrack memories. Here we report experimental results of current modulation of the magnetic properties of Co₃Sn₂S₂, and observed a lower current density threshold than conventional metals.