Giant positive magnetoresistance in composite (La0.83Sr0.17MnO3)0.6(ITO)0.4

被引：16

作者：

Zhang, N ^{[1
]}

Wang, M ^{[1
]}

机构：

[1] Nanjing Normal Univ, Magnetoelect Ltd, Nanjing 210097, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 12期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2187475

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the transport property of the composites (La0.83Sr0.17MnO3)(1-x) indium tin oxide (ITO)(x) [ITO=(In2O3)(0.95)(SnO2)(0.05)], which were fabricated by mechanically mixing La0.83Sr0.17MnO3 and ITO grains. A giant positive magnetoresistance (PMR) has been observed above the Curie temperature T-c for the samples with x around 0.40 besides the negative magnetoresistance near and below the T-c. The magnetoresistive ratio for the PMR can reach 39.3% under a magnetic field mu H-0=2800 Oe for (La0.83Sr0.17MnO3)(0.6)(ITO)(0.4). Analysis suggests that the magnetic field-induced broadening of the p-n barrier between both kinds of grains and a suitable density of the p-n heterostructures should be responsible for the PMR behavior.

引用

页数：3

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