Grain boundary effects on transport in metalorganic chemical vapor deposition-grown, Ca-doped lanthanum manganites

被引：9
|
作者：
Heremans, JJ [1 ]
Watts, S [1 ]
Wirth, S [1 ]
Yu, X [1 ]
Gillman, ES [1 ]
Dahmen, KH [1 ]
von Molnár, S [1 ]
机构：
[1] Florida State Univ, MARTECH, Tallahassee, FL 32306 USA
来源：
JOURNAL OF APPLIED PHYSICS | 1998年 / 83卷 / 11期
关键词：
D O I：
10.1063/1.367548
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The transport properties of metalorganic chemical vapor deposited films of lanthanum manganite grown on various substrates are investigated, The more disordered films show a magnetoresistance that is both large and relatively temperature independent over a wide temperature range. At low magnetic fields, a linear field dependence is observed and is attributed to spin-polarized intergrain tunneling. In addition, at low fields a hysteretic dependence of resistivity on the magnetic field has been observed. This effect has been attributed to the scattering of spin-polarized carriers at the grain boundary. (C) 1998 American Institute of Physics. [S0021-8979(98)18011-8].
引用
收藏
页码：7055 / 7057
页数：3
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