Flexible and efficient manipulation of magnetic configurations can be challenging. In the design of practical devices, achieving a high effective magnetic field with a low working current is under tight demand. Here, we report a unique method for efficient magnetism modulation by direct current injection in magnetic Weyl semimetal Co3Sn2S2. We demonstrate that the modulation process stems from current-assisted domain wall motion. Through two independent methods, we reveal that the spin-transfer torque efficiency of Co3Sn2S2 reaches as high as 2.4-5.6 kOe MA^(-1) cm^2, and the threshold current density for driving the magnetic domain walls is as low as <5.1*10^5 A/cm^2 without an external field, and <1.5*10^5 A/cm^2 with a moderate external field. Our findings manifest a new and powerful approach for sub-micron magnetism manipulation, and also open the door towards a new paradigm of spintronics that combines magnetism, topology, and metallicity for low-energy consumption memory and computing.
@article{arxiv.2011.08391,
title = {Ultra-efficient magnetism modulation in a Weyl ferromagnet by current-assisted domain wall motion},
author = {Qiuyuan Wang and Yi Zeng and Kai Yuan and Qingqi Zeng and Pingfan Gu and Xiaolong Xu and Hanwen Wang and Zheng Han and Kentaro Nomura and Wenhong Wang and Enke Liu and Yanglong Hou and Yu Ye},
journal= {arXiv preprint arXiv:2011.08391},
year = {2022}
}