Synthesis, crystal structure, and magnetic properties of BiMnO(NO) oxynitrate comprising =3/2 honeycomb lattice

Smirnova, O.*; Azuma, Masaki*; Kumada, Nobuhiro*; Kusano, Yoshihiro*; Matsuda, Masaaki; Shimakawa, Yuichi*; Takei, Takahiro*; Yonesaki, Yoshinori*; Kinomura, Nobukazu*

Journal of the American Chemical Society, 131(23), p.8313 - 8317, 2009/05

https://doi.org/10.1021/ja901922p

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