Research into practical applications of magnetic skyrmions, nanoscale solitons with interesting topological and transport properties, has traditionally focused on two dimensional (2D) thin-film systems. However, the recent observation of novel three dimensional (3D) skyrmion-like structures, such as hopfions, skyrmion strings (SkS), skyrmion bundles, and skyrmion braids, motivates the investigation of new designs, aiming to exploit the third spatial dimension for more compact and higher performance spintronic devices in 3D or curvilinear geometries. A crucial requirement of such device schemes is the control of the 3D magnetic structures via charge or spin currents, which has yet to be experimentally observed. In this work, we utilise real-space imaging to investigate the dynamics of a 3D SkS within a nanowire of Co₈Zn₉Mn₃ at room temperature. Utilising single current pulses, we demonstrate current-induced nucleation of a single SkS, and a toggle-like positional switching of an individual Bloch point at the end of a SkS. The observations highlight the possibility to locally manipulate 3D topological spin textures, opening up a range of design concepts for future 3D spintronic devices.

对磁性斯格明子（具有有趣的拓扑和传输特性的纳米级孤子）的实际应用的研究传统上集中在二维（2D）薄膜系统上。然而，最近对新型三维 (3D) skyrmion-like 结构的观察，例如 hopfions、skyrmion string (SkS)、skyrmion bundles 和 skyrmion braids，激发了对新设计的研究，旨在利用三维空间获得更多紧凑和高性能的 3D 或曲线几何形状的自旋电子器件。这种器件方案的一个关键要求是通过电荷或自旋电流控制 3D 磁结构，这尚未通过实验观察到。_{在这项工作中，我们利用真实空间成像来研究 Co 8}纳米线内 3D SkS 的动力学Zn ₉ Mn ₃在室温下。利用单个电流脉冲，我们展示了单个 SkS 的电流诱导成核，以及在 SkS 末端的单个 Bloch 点的类似切换的位置切换。观察结果强调了局部操纵 3D 拓扑自旋纹理的可能性，为未来的 3D 自旋电子器件开辟了一系列设计概念。