Electric current-induced giant electroresistance in epitaxial La0.67Sr0.33MnO3 thin films

被引：24
|
作者：
Sun, Y. H. [1 ]
Zhao, Y. G. [1 ]
Zhang, X. L. [1 ]
Gao, S. N. [1 ]
Lang, P. L. [1 ]
Zhang, X. P. [1 ]
Zhu, M. H. [1 ]
机构：
[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 311卷 / 02期
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词：
La0.67Sr0.33MnO3; electroresistance; thin film; phase separation;
D O I：
10.1016/j.jmmm.2006.08.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The electronic transport behavior of La0.67Sr0.33MnO3 epitaxial thin films with different thicknesses has been investigated under various applied DC currents. The 20 and 70 nm thick films show a giant negative electroresistance (ER). In contrast, the films with 100 nm thickness show unusual giant positive ER, which can reach 30% with the current density of 1.8 x 10(8) A/cm(2) at room temperature. It is interesting that the electric current can also change the magnetoresistance of the films. The results were explained by considering the spin polarized current induced increase of ferromagnetic metallic phase and current-induced lattice distortion via electron wind force under high current density. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：644 / 650
页数：7
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