一种具有准二维层状结构的新多晶型 Cu2(VO4)(OH) 的合成与磁性。

Synthesis and magnetic properties of a new polymorph of Cu2(VO4)(OH) with a quasi-2D layer structure.

机构信息

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

出版信息

Dalton Trans. 2014 Mar 7;43(9):3521-7. doi: 10.1039/c3dt53009d.

DOI:10.1039/c3dt53009d

PMID:24424388

Abstract

A new polymorph of copper(ii) vanadate, Cu2(VO4)(OH), containing a layered magnetic sublattice, is synthesized by a hydrothermal reaction. It displays a 3D framework based on copper(ii) oxide layers which are further connected by VO4 tetrahedra through corner-sharing {V-O-Cu} bonds in the system. The copper(ii) oxide layer is constructed by the interactions of Cu3(μ3-OH) building units. Magnetic properties are investigated by means of magnetic susceptibility, magnetization and heat capacity measurements. The results indicate a typical long-range canted antiferromagnetic ordering below ∼10 K and weak spin frustration arising from the competition between antiferromagnetic and ferromagnetic interactions inside the irregular Cu3(μ3-OH) triangles.

摘要

一种新的铜（II）钒酸盐多晶型物，Cu2(VO4)(OH)，包含一个层状磁亚晶格，是通过水热反应合成的。它显示了一个基于氧化铜层的 3D 框架，该框架通过角共享 {V-O-Cu} 键进一步通过 VO4 四面体连接，在该系统中。氧化铜层由 Cu3(μ3-OH) 建筑单元的相互作用构建。通过磁化率、磁化和热容测量研究了磁性。结果表明，在 ∼10 K 以下存在典型的长程倾斜反铁磁有序，并且由于不规则 Cu3(μ3-OH) 三角形内部的反铁磁和铁磁相互作用之间的竞争，出现了弱的自旋受挫。