An isostructural series of transition metal-formate-chloride-hydrate compounds, M₃(OOCH)₅Cl(OH₂) (M = Fe, Co, Ni), have been synthesized using a solvothermal method. These compounds crystallize in the chiral and polar space group P3₁ and are comprised of three different types of helical chains of edge-sharing M²⁺-centered octahedra. All three compounds undergo 3D ferrimagnetic ordering at low temperature, and the iron and cobalt analogues exhibit field-induced metamagnetic transitions. The magnetic structure was determined by neutron powder diffraction, revealing ferromagnetic intrachain coupling and antiferromagnetic interchain interactions, with the three chains arranged in a two-up/one-down triangular lattice. As all three chains contain one type of metal in the same spin state, these compounds are rare examples of homospin topological ferrimagnets.

中文翻译：

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一系列手性，极性，高同型拓扑Ferrimagnets：M ₃（OOCH）₅ Cl（OH ₂）（M = Fe，Co，Ni）

使用溶剂热法合成了一系列等构的过渡金属-甲酸盐-氯化物-水合物，M ₃（OOCH）₅ Cl（OH ₂）（M = Fe，Co，Ni）。这些化合物在手性和极性空间群P 3 _1中结晶，并且由边缘共享M ²⁺的三种不同类型的螺旋链组成中心的八面体。这三种化合物均在低温下经历3D亚铁磁性排序，铁和钴的类似物表现出场诱导的亚磁跃迁。磁性结构是通过中子粉末衍射确定的，揭示了铁磁性的链内耦合和反铁磁性的链间相互作用，其中三个链排列成上下两个三角晶格。由于所有三个链均以相同的自旋态包含一种类型的金属，因此这些化合物是高自旋拓扑亚铁的罕见例子。