具有帽状 Kagomé 自旋晶格的钼酸盐 - 碲酸盐化合物。

Molybdate-Tellurite Compounds with Capped-Kagomé Spin-Lattices.

作者信息

Zhang Wanwan, He Zhangzhen, Xie Yaxin, Cui Meiyan, Zhang Suyun, Chen Sihuai, Zhao Zhiying, Zhang Mengsi, Huang Xiaoying

机构信息

State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China.

University of Chinese Academy of Sciences , Beijing , 100049 , China.

出版信息

Inorg Chem. 2020 Feb 17;59(4):2299-2307. doi: 10.1021/acs.inorgchem.9b03050. Epub 2020 Feb 3.

DOI:10.1021/acs.inorgchem.9b03050

PMID:32009382

Abstract

Three new molybdate-tellurites, KM(TeO)(MoO)(OH) (M = Ni and Co) and (NH)Cu(TeO)(MoO)(OH), have been successfully synthesized by conventional hydrothermal method. Due to the influence of the Jahn-Teller effect, these compounds crystallize in different space groups of rhombohedral 3̅, monoclinic 2/ and triclinic 1̅ for Ni-, Co-, and Cu-analogues, respectively. The topological arrangements of magnetic ions in these compounds show that deficient capped-kagomé spin-lattices with kagomé positions exhibit different 1/6 depletion. Magnetic and specific heat measurements confirm that KNi(TeO)(MoO)(OH) exhibits a spin-glass behavior at low temperature, while (NH)Cu(TeO)(MoO)(OH) possesses a long-range canted antiferromagnetic ordering with ∼ 10.8 K and further shows a 3/5 magnetization plateau in the magnetization curve at low temperature.

摘要

通过传统水热法成功合成了三种新型钼酸碲酸盐，即KM(TeO)(MoO)(OH)（M = Ni和Co）以及(NH)Cu(TeO)(MoO)(OH)。由于 Jahn-Teller 效应的影响，这些化合物分别以菱面体3̅、单斜2/和三斜1̅的不同空间群结晶，分别对应镍、钴和铜的类似物。这些化合物中磁性离子的拓扑排列表明，具有 kagomé 位置的缺陷盖帽 kagomé 自旋晶格呈现出不同的 1/6 耗尽。磁性和比热测量证实，KNi(TeO)(MoO)(OH)在低温下表现出自旋玻璃行为，而(NH)Cu(TeO)(MoO)(OH)具有约10.8 K的长程倾斜反铁磁有序，并且在低温下的磁化曲线中进一步显示出3/5磁化平台。