Temperature dependence of electroresistance for La0.67Ba0.33MnO3 manganite

被引：5

作者：

Kumar, Rajesh ^{[2
,3
]}

Gupta, Ajal K. ^{[2
,3
]}

Kumar, Vijay ^{[2
]}

Bhalla, G. L. ^{[3
]}

Khare, Neeraj ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, New Delhi 110016, India

[2] Natl Phys Lab, New Delhi 110012, India

[3] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2007年 / 68卷 / 12期

关键词：

magnetic materials; oxides; electrical properties;

D O I：

10.1016/j.jpcs.2007.07.081

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The influence of dc biasing current on temperature dependence of resistance of La0.67Ba0.33MnO3 bulk sample is reported. A decrease in the resistance (electroresistance) on the application of higher bias current is observed. The electroresistance is maximum at metal-insulator transition temperature (T-MI) and decreases when the temperature is either increased or decreased from T-MI. A two-phase model is proposed to explain the occurrence of electroresistance. The higher bias current leads to an increase in alignment of spins and thus, in turn, leads to an increase in spin stiffness coefficient and decrease in the resistance at TMI. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2394 / 2397

页数：4

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