Ultra-efficient magnetism modulation in a Weyl ferromagnet by current-assisted domain wall motion

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 inje...

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Bibliographic Details
Published in:arXiv.org 2022-03
Main Authors: Wang, Qiuyuan, Zeng, Yi, Yuan, Kai, Zeng, Qingqi, Gu, Pingfan, Xu, Xiaolong, Wang, Hanwen, Han, Zheng, Nomura, Kentaro, Wang, Wenhong, Liu, Enke, Hou, Yanglong, Yu, Ye
Format: Article
Language:English
Subjects:
Domain walls
Efficiency
Energy consumption
Fermions
Hysteresis loops
Low currents
Magnetic domains
Magnetic moments
Magnetism
Metalloids
Modulation
Multilayers
Topology
Torque
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Summary: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
ISSN:2331-8422