Antiferromagnets exhibiting distinctive responses to the electric and magnetic fields have attracted attention as breakthrough materials in spintronics. The current-induced Néel-order spin-orbit torque can manipulate the antiferromagnetic domain wall (AFDW) in a collinear CuMnAs owing to a lack of local inversion symmetry. Here, we demonstrate that the electrical nucleation, displacement, and detection of AFDWs are also possible in a noncollinear antiferromagnet, i.e., chiral Mn₃Sn with local inversion symmetry. The asymmetric magnetoresistance measurements reveal that AFDWs align parallel to the kagome planes in the microfabricated wire. Numerical calculation shows these AFDWs consist of stepwise sub-micron size Bloch wall-like spin textures in which the octupole moment gradually rotates over three segments of domain walls. We further observed that the application of a pulse-current drives these octupole based AFDWs along the wire. Our findings could provide a guiding principle for engineering the AFDW structure in the chiral antiferromagnetic materials.

作为自旋电子学中的突破性材料，反铁磁体对电场和磁场表现出独特的响应，已引起人们的关注。由于缺乏局部反演对称性，电流感应的Néel级自旋轨道转矩可在共线CuMnAs中操纵反铁磁畴壁（AFDW）。在这里，我们证明了在非共线反铁磁体（即手性Mn _3）中AFDW的电成核，位移和检测也是可能的Sn具有局部反演对称性。非对称磁阻测量显示，AFDW与微细加工导线中的kagome平面平行排列。数值计算表明，这些AFDW由逐步亚微米级的Bloch壁状自旋织构组成，其中八极矩在畴壁的三段上逐渐旋转。我们进一步观察到，脉冲电流的应用沿导线驱动了这些基于八极的AFDW。我们的发现可以为手性反铁磁材料中AFDW结构的工程设计提供指导。