论文标题
极地四方金属间ndcoge $ _3 $中的复杂磁性阶段
Complex magnetic phases in polar tetragonal intermetallic NdCoGe$_3$
论文作者
论文摘要
极性材料可以容纳各种具有拓扑意义的磁相，这些磁相通常是从调制的磁接地状态出现的。相对较少的非中心四方材料已显示出具有拓扑自旋纹理，而新的候选材料对于扩大当前的理论模型是必需的。该手稿通过热力学和中子衍射测量值报告了极性四方材料NDCOGE $ _3 $中各向异性磁的。先前报道的$ h $ - $ t $相图已更新为包括几个额外阶段，这些阶段都存在于$ h $ = 0，并且具有应用的字段h $ \ perp $ c。中子衍射数据表明，低于$ t_ {n1} $ = 3.70 k和$ t_ {n2} $ = 3.50 k的磁结构是不稳定的，其基态磁性顺序在所有方向上都与繁殖向量$ \ vec {k} $ =（0.494，0.494，0.0044，0.385）at in Dorightate n Directive n Direction nocrantate Ath。但是，讨论了可能的单个和多 - $ \ vec {k} $旋转模型。这些结果表明，NDCOGE3托管从调制的磁矩衍生出的复杂磁顺序。
Polar materials can host a variety of topologically significant magnetic phases, which often emerge from a modulated magnetic ground state. Relatively few noncentrosymmetric tetragonal materials have been shown to host topological spin textures and new candidate materials are necessary to expand the current theoretical models. This manuscript reports on the anisotropic magnetism in the polar, tetragonal material NdCoGe$_3$ via thermodynamic and neutron diffraction measurements. The previously reported $H$-$T$ phase diagram is updated to include several additional phases, which exist for both $H$ = 0 and with an applied field H$\perp$ c. Neutron diffraction data reveal that the magnetic structures below $T_{N1}$ = 3.70 K and $T_{N2}$ = 3.50 K are incommensurate, with a ground state magnetic order that is incommensurate in all directions with the propagation vector $\vec{k}$ = (0.494, 0.0044, 0.385) at 1.8 K. A unique magnetic structure solution is not achievable, but the possible single and multi-$\vec{k}$ spin models are discussed. These results demonstrate that NdCoGe3 hosts complicated magnetic order derived from modulated magnetic moments.
