Syntheses, Structure, and 2/5 Magnetization Plateau of a 2D Layered Fluorophosphate Na3Cu5(PO4)4F·4H2O

• Published in: Inorganic chemistry 2018-03, Vol.57 (6), p.3151-3157
• Main Authors: Yue, Xiaoyu, Ouyang, Zhongwen, Cui, Meiyan, Yin, Lei, Xiao, Guiling, Wang, Zhenxing, Liu, Juan, Wang, Junfeng, Xia, Zhengcai, Huang, Xiaoying, He, Zhangzhen
• Format: Article
• Language: English
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.7b03159

A new two-dimensional (2D) fluorophosphate compound Na3Cu5(PO4)4F·4H2O with a Cu5 cluster has been synthesized using a conventional hydrothermal method. The compound crystallizes in the orthorhombic crystal system with space group Pnma. The 2D layered structure is formed by cap-like {Cu5(PO4)4F} building units consisting of a Cu4O12F cluster plus a residual cap Cu2+ ion. Magnetic susceptibility exhibits a broad maximum at T 2 = 19.2 K due to low-dimensional character followed by a long-range antiferromagnetic ordering at T 1 = 11.5 K, which is further confirmed by the specific heat data. High-field magnetization measurement demonstrates a 2/5 quantum magnetization plateau above 40 T. The ESR data indicate the presence of magnetic anisotropy, in accordance with the 2D structure of the system.