包含S = 3/2蜂窝晶格的硝酸氧铋Bi3Mn4O12(NO3)的合成、晶体结构及磁性

Synthesis, crystal structure, and magnetic properties of Bi3Mn4O12(NO3) oxynitrate comprising S = 3/2 honeycomb lattice.

作者信息

Smirnova Olga, Azuma Masaki, Kumada Nobuhiro, Kusano Yoshihiro, Matsuda Masaaki, Shimakawa Yuichi, Takei Takahiro, Yonesaki Yoshinori, Kinomura Nobukazu

机构信息

Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.

出版信息

J Am Chem Soc. 2009 Jun 17;131(23):8313-7. doi: 10.1021/ja901922p.

DOI:10.1021/ja901922p

PMID:19507911

Abstract

Neutron diffraction and FT-IR analysis revealed that the novel oxynitrate Bi(3)Mn(4)O(12)(NO(3)) (space group P3, a = 4.9692(1) A, c = 13.1627(3) A) prepared by hydrothermal synthesis is of a new structural type including flat NO(3) layers alternating with blocks of two PbSb(2)O(6)-like layers. Mn(4+) (S = (3)/(2)) forms a regular honeycomb lattice, and magnetic susceptibility data indicated two-dimensional magnetism. Despite its Weiss constant of -257 K, no long-range ordering was observed down to 0.4 K because of the magnetic frustration due to the competition between the nearest and the next-nearest antiferromagnetic interactions.

摘要

中子衍射和傅里叶变换红外光谱分析表明，通过水热合成制备的新型硝酸氧铋Bi(3)Mn(4)O(12)(NO(3))（空间群P3，a = 4.9692(1) Å，c = 13.1627(3) Å）属于一种新的结构类型，包括扁平的NO(3)层与两个类PbSb(2)O(6)层的块交替排列。Mn(4+)（S = (3)/(2)）形成规则的蜂窝晶格，磁化率数据表明存在二维磁性。尽管其魏斯常数为 -257 K，但由于最近邻和次近邻反铁磁相互作用之间的竞争导致的磁阻挫，在低至0.4 K时未观察到长程有序。