标题： 稳定且可操控的布洛赫点 显示英文标题

标题： Stable and manipulable Bloch point

摘要： 磁涡旋的预测被用来改变我们存储和处理数据的方式，这使得具有Dzyaloshinskii-Moriya相互作用的材料成为深入研究的焦点。 到目前为止，研究主要集中在由具有单一手性的材料组成的磁性系统上。 在寻找潜在的未来自旋电子器件的过程中，将具有不同手性的材料组合成一个系统可能代表了一个重要的新研究方向。 使用有限元微磁模拟，我们研究了一个具有两层不同手性的FeGe盘。 我们表明，在特定的层厚度下，两个层之间的界面会出现稳定的Bloch点。 此外，我们证明了该系统表现出滞回行为，并且存在两种不同类型的Bloch点。 这些“头对头”和“尾对尾”的Bloch点配置可以在施加外部磁场的情况下相互切换。 最后，通过研究磁化场的时间演化，我们揭示了Bloch点的形成机制。 我们的结果为未来自旋电子器件的发展引入了一种稳定且可操控的Bloch点，作为类似粒子的状态候选。 显示英文摘要

摘要： The prediction of magnetic skyrmions being used to change the way we store and process data has led to materials with Dzyaloshinskii-Moriya interaction coming into the focus of intensive research. So far, studies have looked mostly at magnetic systems composed of materials with single chirality. In a search for potential future spintronic devices, combination of materials with different chirality into a single system may represent an important new avenue for research. Using finite element micromagnetic simulations, we study an FeGe disk with two layers of different chirality. We show that for particular thicknesses of layers, a stable Bloch point emerges at the interface between two layers. In addition, we demonstrate that the system undergoes hysteretic behaviour and that two different types of Bloch point exist. These `head-to-head' and `tail-to-tail' Bloch point configurations can, with the application of an external magnetic field, be switched between. Finally, by investigating the time evolution of the magnetisation field, we reveal the creation mechanism of the Bloch point. Our results introduce a stable and manipulable Bloch point to the collection of particle-like state candidates for the development of future spintronic devices.