论文标题
观察手性磁铁中的域壁双门
Observation of domain wall bimerons in chiral magnets
论文作者
论文摘要
已经在各种系统中提出了嵌入或与域壁结合的拓扑缺陷，其中一些被称为域壁天空或域壁Bimeron。但是，对这种拓扑缺陷的实验观察仍然是一个持续的挑战。在这里，使用Lorentz透射电子显微镜，我们报告了手性磁铁Co-Zn-Mn（110）薄膜中域壁双杆的实验发现。通过施加磁场，多域结构并同时链接和隔离的bimeron出现，作为域之间的域之间的局部状态，其平面内部成分是净磁化的相反的。多域的形成归因于磁各向异性和偶极相互作用，并且域壁双杆通过dzyaloshinskii-Moriya相互作用稳定。此外，微磁模拟表明，在具有立方磁各向异性的手性磁铁中，域壁bimerons出现在各种条件下。我们的结果促进了在各个物理领域的进一步研究。
Topological defects embedded in or combined with domain walls have been proposed in various systems, some of which are referred to as domain wall skyrmions or domain wall bimerons. However, the experimental observation of such topological defects remains an ongoing challenge. Here, using Lorentz transmission electron microscopy, we report the experimental discovery of domain wall bimerons in chiral magnet Co-Zn-Mn(110) thin films. By applying a magnetic field, multidomain structures develop, and simultaneously, chained and isolated bimerons arise as the localized state between the domains with the opposite in-plane components of net magnetization. The multidomain formation is attributed to magnetic anisotropy and dipolar interaction, and domain wall bimerons are stabilized by the Dzyaloshinskii-Moriya interaction. In addition, micromagnetic simulations show that domain wall bimerons appear for a wide range of conditions in chiral magnets with cubic magnetic anisotropy. Our results promote further study in various fields of physics.
