Deposition conditions of magnetoresistance in La0.67Ca0.33MnO3-delta thin film

被引：30
作者：
Guo, JQ
Takeda, H
Kazama, NS
Fukamichi, K
Tachiki, M
机构：
[1] TOHOKU UNIV,FAC ENGN,DEPT MAT SCI,SENDAI,MIYAGI 980,JAPAN
[2] NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN
来源：
JOURNAL OF APPLIED PHYSICS | 1997年 / 81卷 / 11期
关键词：
D O I：
10.1063/1.365286
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetoresistance of the La0.67Ca0.33MnO3-delta thin films was investigated. The magnetoresistance depends on ablation conditions such as the substrate temperature and oxygen pressure and has a relation with the lattice constants of the thin films, A colossal magnetoresistance ratio with 4.79 x 10(6)% was obtained at 70 K and a magnetic field of 5.5 T. The resistivity of the thin films has a close relation with the substrate temperature and the oxygen pressure. When the substrate temperature is fixed, the resistivity shows double peaks in the oxygen pressure range of 1 x 10(-7) to 1 Torr. (C) 1997 American Institute of Physics.
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页码：7445 / 7449
页数：5
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