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

页码：7055 / 7057

页数：3

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