Synthesis, Crystal Structure, and Magnetic Properties of Bi3Mn4O12(NO3) Oxynitrate Comprising S=3/2 Honeycomb Lattice
Synthesis, Crystal Structure, and Magnetic Properties of Bi3Mn4O12(NO3) Oxynitrate Comprising S=3/2 Honeycomb Lattice
复制标题
DOI：
10.1021/ja901922p
复制
发表时间：
2009-06-17
影响因子：
15
通讯作者：
Kinomura, Nobukazu
中科院分区：
文献类型：
--
作者：
Smirnova, Olga;Azuma, Masaki;Kinomura, Nobukazu
中子衍射和FT-IR分析表明，通过水热合成制备的新型含氧硝酸盐Bi3Mn4O12(NO3)（空间群P3，a = 4.9692（1）埃，c = 13.1627（3）埃）具有新的结构类型，包括平坦的NO3层与两个类PbSb2O6层块交替。 Mn4+（S = 3/2）形成规则的蜂窝状晶格，磁化率数据表明具有二维磁性。尽管其韦斯常数为 -257 K，但由于最近和次近反铁磁相互作用之间的竞争而导致磁挫败，因此没有观察到低至 0.4 K 的长程有序性。
Neutron diffraction and FT-IR analysis revealed that the novel oxynitrate Bi3Mn4O12(NO3) (space group P3, a = 4.9692(1) angstrom, c = 13.1627(3) angstrom) prepared by hydrothermal synthesis is of a new structural type including flat NO3 layers alternating with blocks of two PbSb2O6-like layers. Mn4+ (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.