Crystal Structure and Superconducting Properties of Hexagonal Lithium–Niobium Oxynitride

A hexagonal oxynitride (Li0.88□0.12)Nb3.0(O0.13N0.87)4 was synthesized through ammonia nitridation of LiNb3O8. The structural analysis revealed that this oxynitride consists of alternate stacking of octahedral and prismatic layers with different Li/Nb ratios: significant amounts of Li and Nb atoms (...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic chemistry 2012-10, Vol.51 (20), p.11184-11189
Main Authors: Motohashi, Teruki, Ito, Masahiko, Masubuchi, Yuji, Wakeshima, Makoto, Kikkawa, Shinichi
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A hexagonal oxynitride (Li0.88□0.12)Nb3.0(O0.13N0.87)4 was synthesized through ammonia nitridation of LiNb3O8. The structural analysis revealed that this oxynitride consists of alternate stacking of octahedral and prismatic layers with different Li/Nb ratios: significant amounts of Li and Nb atoms (Li/Nb = 43/57) coexist in the octahedral layer, while the prismatic site is preferentially occupied by Nb (Li/Nb = 3/97). A metallic behavior was accompanied by an abrupt drop of electrical resistivity at about 3 K. Furthermore, large diamagnetism and specific-heat anomaly were observed below this temperature, suggesting the appearance of superconductivity in the Li–Nb oxynitride.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic301870n