具有四列 ribbon 结构的新型硼磷酸盐 SrCo2BPO7 的合成与磁性。

Synthesis and magnetic properties of a new borophosphate SrCo2BPO7 with a four-column ribbon 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, Fujian 350002, China.

出版信息

Inorg Chem. 2013 Mar 4;52(5):2492-6. doi: 10.1021/ic3023979. Epub 2013 Feb 13.

DOI:10.1021/ic3023979

PMID:23406089

Abstract

A new borophosphate SrCo2BPO7 is synthesized by a conventional high-temperature solid-state reaction. The titled compound is found to crystallize in monoclinic system with space group P21/c, which displays a distorted four-column ribbon structure. Both BO3 triangles and PO4 tetrahedra are isolated, while irregular triangles built by Co(2+) ions are found to exist between the connecting ribbons. Magnetic behaviors are investigated by means of susceptibility, magnetization, and heat capacity measurements. The results confirm that SrCo2BPO7 possesses a three-dimensional antiferromagnetic ordering at 25 K. The possible spin arrangements in the system are also suggested.

摘要

一种新的硼磷酸盐 SrCo2BPO7 通过传统的高温固相反应合成。该标题化合物被发现结晶为单斜晶系，空间群为 P21/c，呈现出扭曲的四列丝带结构。BO3 三角形和 PO4 四面体都是孤立的，而在连接的丝带之间发现了由 Co(2+) 离子构成的不规则三角形。通过磁化率、磁化和热容测量研究了磁性能。结果证实 SrCo2BPO7 在 25 K 时具有三维反铁磁有序。还提出了系统中可能的自旋排列。