Study of the relationship between electrical and magnetic properties and Jahn-Teller distortion in R0.7Ca0.3Mn0.95Fe0.05O3 perovskites

被引：16

作者：

Abdel-Khalek, E. K. ^{[1
]}

El-Meligy, W. M. ^{[1
]}

Mohamed, E. A. ^{[1
]}

Amer, T. Z. ^{[1
]}

Sallam, H. A. ^{[1
]}

机构：

[1] Al Azhar Univ, Fac Sci, Dept Phys, Nasr City, Cairo, Egypt

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 02期

关键词：

POLARON HOPPING CONDUCTION; THERMOELECTRIC-POWER; TRANSPORT-PROPERTIES; FE; MAGNETORESISTANCE; MOSSBAUER; SUBSTITUTION; TRANSITION; FIELD;

D O I：

10.1088/0953-8984/21/2/026003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

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 (Pbnm) 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 on replacing Pr3+ by Nd3+. This replacement 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

页数：5

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