伊利石型 KCuO(SeO)Cl 中耦合自旋四面体的磁性。

Theoretical Physics and Applied Mathematics Department, Ural Federal University, 620002, Ekaterinburg, Russia.

Department of Chemistry, Moscow State University, 119991, Moscow, Russia.

Sci Rep. 2018 Feb 5;8(1):2379. doi: 10.1038/s41598-018-20350-z.

Synthesis, thermodynamic properties, and microscopic magnetic model of ilinskite-type KCuO(SeO)Cl built by corner-sharing Cu tetrahedra are reported, and relevant magnetostructural correlations are discussed. Quasi-one-dimensional magnetic behavior with the short-range order around 50 K is rationalized in terms of weakly coupled spin ladders (tubes) having a complex topology formed upon fragmentation of the tetrahedral network. This fragmentation is rooted in the non-trivial effect of the SeO groups that render the Cu-O-Cu superexchange strongly ferromagnetic even at bridging angles exceeding 110°.

报道了由顶角共享的 Cu 四面体构建的伊林斯基型 KCuO(SeO)Cl 的合成、热力学性质和微观磁学模型，并讨论了相关的磁结构相关性。准一维磁行为具有约 50 K 的短程有序，可以用具有复杂拓扑结构的弱耦合自旋梯（管）来合理化，这种拓扑结构是由于四面体网络的碎裂而形成的。这种碎裂源于 SeO 基团的重要影响，即使在桥接角超过 110°时，Cu-O-Cu 超交换也表现出强烈的铁磁性。