Synthesis, structure, thermal, transport and magnetic properties of VN ceramics

0470913 - FZÚ 2017 RIV GB eng J - Journal Article
Huber, Š. - Jankovský, O. - Sedmidubský, D. - Luxa, J. - Klimová, K. - Hejtmánek, Jiří - Sofer, Z.
Synthesis, structure, thermal, transport and magnetic properties of VN ceramics.
Ceramics International. Roč. 42, č. 16 (2016), s. 18779-18784. ISSN 0272-8842. E-ISSN 1873-3956
R&D Projects: GA ČR GA13-20507S
Institutional support: RVO:68378271
Keywords : vanadium mononitride * phase transition * electronic structure * heat capacity * transport properties
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.986, year: 2016

We present a detailed study investigating structure, thermal, transport and magnetic properties of vanadium mononitride. Pure vanadium mononitride ceramics with a stoichiometry very close to ideal composition VN was synthesized by ammonolysis of ammonium vanadate followed by sintering in NH3/N2 atmosphere. The detailed chemical and thermochemical analysis as well as transport properties measurement reveal stoichiometric composition of VN. The low temperature electrical and thermal transport measurements show superconducting transition at 8 K, a gradual structural phase transition below 250 K and a high temperature phase decomposition accompanied by V2N formation. The electronic structure calculations are correlated with the analysis of transport and thermal properties revealing an essential role of electron-phonon coupling and strong anharmonic effects.
Permanent Link: http://hdl.handle.net/11104/0268423