Molybdate-Tellurite Compounds with Capped-Kagomé Spin-Lattices

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

doi:10.1021/acs.inorgchem.9b03050

Molybdate-Tellurite Compounds with Capped-Kagomé Spin-Lattices

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

Authors

Wanwan Zhang^{1

2}, Zhangzhen He¹, Yaxin Xie^{1

2}, Meiyan Cui¹, Suyun Zhang¹, Sihuai Chen¹, Zhiying Zhao¹, Mengsi Zhang^{1

2}, Xiaoying Huang¹

Affiliations

¹ State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China.
² University of Chinese Academy of Sciences , Beijing , 100049 , China.

PMID: 32009382
DOI: 10.1021/acs.inorgchem.9b03050

Abstract

Three new molybdate-tellurites, K₂M₉(TeO₃)₄(MoO₄)₄(OH)₄ (M = Ni^II and Co^II) and (NH₄)₂Cu₉^II(TeO₃)₄(MoO₄)₄(OH)₄, 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 R3̅m, monoclinic P2₁/c and triclinic P1̅ 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 K₂Ni₉(TeO₃)₄(MoO₄)₄(OH)₄ exhibits a spin-glass behavior at low temperature, while (NH₄)₂Cu₉(TeO₃)₄(MoO₄)₄(OH)₄ possesses a long-range canted antiferromagnetic ordering with T_N ∼ 10.8 K and further shows a 3/5 magnetization plateau in the magnetization curve at low temperature.