Structural, magnetic, and transport properties in a Cu-doped La0.7Ca0.3MnO3 system

被引：43

作者：

Wang, KY ^{[1
]}

Song, WH

Dai, JM

Ye, SL

Wang, SG

Fang, J

Chen, JL

Gao, BJ

Du, JJ

Sun, YP

机构：

[1] Acad Sinica, Inst Solid State Phys, Lab Internal Frict & Defect Solids, Hefei 230031, Peoples R China

[2] Natl High Magnet Field Lab, Hefei 230031, Peoples R China

[3] Univ Sci & Technol China, Struct Res Lab, Anhua 230026, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2001年 / 90卷 / 12期

关键词：

D O I：

10.1063/1.1415757

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structural, magnetic, and transport properties of La0.7Ca0.3Mn1-xCuxO3 (0 less than or equal tox less than or equal to0.2) have been investigated. The maximum magnetoresistance (MR) is about 4x10(6)% for the sample with x=0.15, which is about similar to 10(4) times the maximum MR for samples with x less than or equal to0.1. A change in the structural parameters and magnetic and resistivity properties of the samples shows that Cu exists in Cu3+ ionic form in the sample with x less than or equal to0.05. However, Cu2+ ions begin to appear and then they increase with further Cu doping. (C) 2001 American Institute of Physics.

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页码：6263 / 6267

页数：5

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