STUDY OF THE RELATIONSHIP BETWEEN ELECTRICAL AND MAGNETIC PROPERTIES AND JAHN-TELLER DISTORTION IN R0.7Ca0.3Mn0.95Fe0.05O3 PEROVSKITES BY MOSSBAUER EFFECT

被引：0
|
作者：
Abdel-Khalek, E. K. [1 ]
El-Meligy, W. M. [2 ]
Mohamed, E. A. [2 ]
Amer, T. Z. [2 ]
Sallam, H. A. [2 ]
机构：
[1] Al Azhar Univ, Fac Sci, Dept Phys, Cairo, Egypt
[2] Al Azhar Univ, Fac Sci, Dept Phys, Mossbauer Lab, Cairo, Egypt
来源：
MODERN TRENDS IN PHYSICS RESEARCH: THIRD INTERNATIONAL CONFERENCE ON MODERN TRENDS IN PHYSICS RESEARCH | 2011年
关键词：
Rare-earth manganite; X-ray diffraction; Mossbauer; Electrical and magnetic properties; MAGNETORESISTANCE; RESISTIVITY; MANGANITES; TRANSITION; CA;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this work structural, magnetic and electrical properties of R0.7Ca0.3Mn0.95Fe0.05O3 (R= Pr and Nd) perovskite manganites are presented. Structural characterization of these compounds shows that both have orthorhombic (Pbmn) phase. The Mossbauer spectra show clear evidence of the local structural distortion of the Mn(Fe)O-6 octahedron on the basis of non-zero nuclear quadrupole interactions for high-spin Fe3+ ions. It was found that the local structural distortion decreases significantly with replacing Pr3+ by Nd3+. This replacing dependence of the Jahn-Teller coupling strength estimated from the Mossbauer results was found to be consistent with the electrical and magnetic properties.
引用
收藏
页码：110 / 114
页数：5
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