The synthesis of La0.875-xEuxNa0.125CrO3 and its study by Eu-151 Mossbauer spectroscopy

被引：8
|
作者：
Li, LP
Wei, QA
Kang, ZJ
Rui, MQ
Su, WH
机构：
[1] JILIN UNIV, CTR ANAL & MEASUREMENT, CHANGCHUN 130023, PEOPLES R CHINA
[2] JILIN UNIV, DEPT CHEM, CHANGCHUN 130023, PEOPLES R CHINA
[3] ACAD SINICA, INT CTR MAT PHYS, SHENYANG 110015, PEOPLES R CHINA
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1997年 / 249卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
La0.875-xEuxNa0.125CrO3; Eu-151 Mossbauer spectra; XPS; valence fluctuation; isomer shift;
D O I：
10.1016/S0925-8388(96)02854-X
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The perovskite oxides La0.875-xEuxNa0.125CrO3 were prepared at 1200 degrees C by solid state reaction. XRD, XPS and Eu-151 Mossbauer spectra measurements show that the structures are orthorhombic and their lattice distortion degree increases with x. Cr ions are in mixed valence of +3 and +6. With x increasing, the amount of Cr6+ becomes larger. The covalency and length of Eu-O bonds are the most important factors influencing the isomer shift of Eu-151.
引用
收藏
页码：264 / 267
页数：4
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