论文标题
平面磁场诱导双风扇旋转结构，带有$ \ textIt {c} $ - 金属kagome antylic kagome antiferromagnet ymn $ _ {6} $ sn $ _ {6} $
In-plane magnetic field induced double fan spin structure with $\textit{c}$-axis component in metallic kagome antiferromagnet YMn$_{6}$Sn$_{6}$
论文作者
论文摘要
Kagome晶格的几何挫败感使其成为平面电子带，非平凡拓扑特性和新型磁性的绝佳主机。当应用平面内磁场时，金属kagome anteromagnet ymn $ _ {6} $ sn $ _ {6} $在平面磁场时表现出拓扑厅效应（The）。通常与非中心对称磁体中具有较大dzyaloshinskii-Moriya相互作用的非中心对称磁体中的纳米尺寸的非旋转旋转结构有关。在这里，我们使用单晶中子衍射来确定ymn $ _ {6} $ sn $ _ {6} $中磁性结构的场/温度依赖性。我们发现观察到的不能源于磁性的Skyrmion晶格，而是来自平面场诱导的双风扇自旋结构，具有$ \ textIt {C} $ - 轴成分（DFC）。我们的工作提供了实验基础，可以从中建立微观理论以了解观察到的。
The geometrical frustration nature of the kagome lattice makes it a great host to flat electronic band, non-trivial topological properties, and novel magnetisms. Metallic kagome antiferromagnet YMn$_{6}$Sn$_{6}$ exhibits the topological Hall effect (THE) when an in-plane magnetic field is applied. THE is typically associated with the nanometer-sized non-coplanar spin structure of skyrmions in non-centrosymmetric magnets with large Dzyaloshinskii-Moriya interaction. Here we use single crystal neutron diffraction to determine the field/temperature dependence of the magnetic structure in YMn$_{6}$Sn$_{6}$. We find that the observed THE cannot arise from a magnetic skyrmion lattice, but instead from an in-plane field-induced double fan spin structure with $\textit{c}$-axis components (DFC). Our work provides the experimental basis from which a microscopic theory can be established to understand the observed THE.
