Growth of double perovskite Ca2FeMoO6 crystals by a floating zone technique

被引：3

作者：

Barbosa, LB

Ardila, DR ^{[1
]}

Andreeta, JP

机构：

[1] Univ Santiago Chile, Dept Fis, Santiago 7254758, Chile

[2] Inst Fis Sao Carlos, DFCM, BR-13560590 Sao Carlos, SP, Brazil

来源：

JOURNAL OF CRYSTAL GROWTH | 2003年 / 254卷 / 3-4期

基金：

巴西圣保罗研究基金会;

关键词：

X-ray diffraction; floating zone technique; calcium compounds;

D O I：

10.1016/S0022-0248(03)01157-6

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Optimized conditions for the growth of good quality double-perovskite transition metal oxide Ca2FeMoO6 crystals by a floating zone technique have been investigated. It was verified that the formation of single phase Ca2FeMoO6 in a large volume of as-grown crystals was found to occur only when isostatic inert atmosphere (ultrapure N-2) at a specific pressure range (0.25-0.50atm) and unreacted starting reagents are used. A secondary phase was evidenced and identified as CaMoO4 from structural refinement data. It is present mainly far from the middle region of 30 mm length crystals grown under more adequate conditions and represents not more than 6.5% in mass percentage. Thermal analysis measurements in air and N-2 reveal that the best as-grown crystal is stable from room temperature to about 1395degreesC, where main and secondary endothermic reactions are evidenced. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：378 / 383

页数：6

共 13 条

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