Crystallization of quasi-two-dimensional vanadates in the CaO-V2O3-VO2-V2O5 system

被引：9

作者：

Maltsev, V ^{[1
]}

Janod, E

机构：

[1] Moscow MV Lomonosov State Univ, Geol Fac, Dept Crystallog & Crystallochem, Moscow 119899, Russia

[2] Inst Mat Jean Rouxel, F-44322 Nantes 3, France

来源：

JOURNAL OF CRYSTAL GROWTH | 2002年 / 240卷 / 1-2期

关键词：

phase diagrams; growth from high-temperature solutions; calcium compounds; vanadates; magnetic materials;

D O I：

10.1016/S0022-0248(02)00856-4

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Investigations of the CaO-V2O3-VO2-V2O5 system under various oxygen pressure and with addition of sodium in starting mixture are described. A diagram of CaV4O9 and CaV3O7 stability and the reaction CaV3O7+VO2<---->CaV4O9 have been studied depending on temperature and oxygen partial pressure. As a result, single-phase CaV4O9 and CaV3O7 ceramics were prepared, and plate-like single crystals of CaV4O9 were grown. Magnetic susceptibility data confirmed the existence of a disordered spin liquid state with spin gap Delta = 100 +/- 15 K in CaV4O9 and of an antiferromagnetic order below T-N = 22K in CaV3O7. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：170 / 175

页数：6

共 7 条

[1] ALKALINE-EARTH HYPOVANADATES - STRUCTURAL EVOLUTION OF CAV-NO-2N+1 SERIES (N=1,2,3,4) [J].