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  • Title: All-electrical switching of a topological non-collinear antiferromagnet at room temperature.
    Author: Deng Y, Liu X, Chen Y, Du Z, Jiang N, Shen C, Zhang E, Zheng H, Lu HZ, Wang K.
    Journal: Natl Sci Rev; 2023 Feb; 10(2):nwac154. PubMed ID: 36872930.
    Abstract:
    Non-collinear antiferromagnetic Weyl semimetals, combining the advantages of a zero stray field and ultrafast spin dynamics, as well as a large anomalous Hall effect and the chiral anomaly of Weyl fermions, have attracted extensive interest. However, the all-electrical control of such systems at room temperature, a crucial step toward practical application, has not been reported. Here, using a small writing current density of around 5 × 106 A·cm-2, we realize the all-electrical current-induced deterministic switching of the non-collinear antiferromagnet Mn3Sn, with a strong readout signal at room temperature in the Si/SiO2/Mn3Sn/AlOx structure, and without external magnetic field or injected spin current. Our simulations reveal that the switching originates from the current-induced intrinsic non-collinear spin-orbit torques in Mn3Sn itself. Our findings pave the way for the development of topological antiferromagnetic spintronics.
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