High-temperature XRD and DTA studies of BiMnO3 perovskite

被引：62

作者：

Faqir, H ^{[1
]}

Chiba, H

Kikuchi, M

Syono, Y

Mansori, M

Satre, P

Sebaoun, A

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 980, Japan

[2] Univ Toulon & Var, Lab Physicochim Mat & Milieu Marin, EA 1356, F-83957 La Garde, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1999年 / 142卷 / 01期

基金：

日本学术振兴会;

关键词：

perovskite; manganese oxide; high-pressure synthesis; high-temperature XRD; thermal analysis; magnetic property;

D O I：

10.1006/jssc.1998.7994

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

BiMnO3 synthesized at high pressure is a triclinically distorted perovskite and a ferromagnetic with T-c = 108 K. High-temperature X-ray diffraction analysis, thermal analysis, thermogravimetry, and magnetic measurements were used to determine stability and the melting sequence of BiMnO3 phase in air. Structural phase transition from triclinic to tetragonal structure has been determined at 490 degrees C in air for a polycrystalline BiMnO3 perovskite. Two phases form immediately at the decomposition temperature of 600 degrees C, namely Bi2O3 and Bi2O3. 2Mn(2)O(3+delta). The Bi2O3. 2Mn(2)O(3+delta) coexists with liquid up to at least 900 degrees C. (C) 1999 Academic Press.

引用

页码：113 / 119

页数：7

共 18 条

[1] Insulator-metal transitions, giant magnetoresistance, and related aspects of the cation-deficient LaMnO3 compositions La1-delta MnO3 and LaMn1-delta O3 [J].