The low-dimensional magnetic systems tend to reveal exotic spin-liquid ground states or form peculiar types of long-range order. Among systems of vivid interest are those characterized by the triangular motif in two dimensions. The realization of either ordered or disordered ground state in triangular, honeycomb, or kagome lattices is dictated by the competition of exchange interactions, also being sensitive to anisotropy and the spin value of magnetic ions. While the low-spin Heisenberg systems may arrive to a spin-liquid long-range entangled quantum state with emergent gauge structures, the high-spin Ising systems may establish the rigid noncollinear structures. Here, we present the case of chiral noncoplanar inverted umbrella-type ferrimagnet formed in cobalt nitrate $\mathrm{Co}{\left({\mathrm{NO}}_3\right)}_2$ below $T_{\mathrm{C}}=3\mathrm{K}$ with the comparable spin and orbital contributions to the total magnetic moment.

中文翻译：

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Co（NO3）2为倒伞型手性非共面亚铁磁体

低维磁系统趋向于揭示奇特的自旋液体基态或形成远距离有序的特殊类型。在生动有趣的系统中，有那些以二维的三角形图案为特征的系统。三角形，蜂窝状或kagome晶格中有序或无序基态的实现取决于交换相互作用的竞争，并且对各向异性和磁离子的自旋值也很敏感。低自旋海森堡系统可能会到达带有自发尺度结构的自旋液体长距离纠缠量子态，而高自旋伊辛系统可能会建立刚性的非共线结构。在这里，我们介绍在硝酸钴中形成的手性非共面倒伞型铁氧体的情况$\mathrm{有限公司}{（{\mathrm{没有}}_3）}_2$ 下面 ${Ť}_{\mathrm{C}}=3\mathrm{ķ}$ 具有对总磁矩可比的自旋和轨道贡献。