Magnetotransport and hysteretic behavior in epitaxial La0.67Ca0.33MnO3-delta films

被引：38

作者：

Canedy, CL ^{[1
]}

Ibsen, KB ^{[1
]}

Xiao, G ^{[1
]}

Sun, JZ ^{[1
]}

Gupta, A ^{[1
]}

Gallagher, WJ ^{[1
]}

机构：

[1] IBM CORP, DIV RES, YORKTOWN HTS, NY 10598 USA

来源：

JOURNAL OF APPLIED PHYSICS | 1996年 / 79卷 / 08期

关键词：

D O I：

10.1063/1.361719

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated epitaxial La0.67Ca0.33MnO3-delta thin films using pulsed laser deposition and performed subsequent thermal treatments. Magnetoresistance values as large as 14000% (Delta rho/rho(H)) were obtained. Above magnetic ordering temperatures, we observed a thermally activated conductivity that also has a quadratic magnetic field dependence. At low temperatures, we found a large hysteresis in the magnetoresistance that correlates with an unusual magnetic hysteresis curve. We interpret the hysteretic behavior as the result of a ''frozen-in'' canted spin structure. Our results suggest that the electron conduction in this material is most sensitive to the canting angle of the neighboring Mn spins. (C) 1996 American Institute of Physics.

引用

页码：4546 / 4548

页数：3

共 15 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].