Transport properties in La0.7−xGdxSr0.3MnO3 system

被引：0

作者：

Guizhen Gao

Ning Liu

Huanyin Guo

Zhirang Cai

Zhensheng Peng

Wei Tong

Changjin Zhang

Yuheng Zhang

机构：

[1] Suzhou Advanced Normal College,Department of Physics

[2] University of Science and Technology of China,Structure Research Laboratory

来源：

Science in China Series G: Physics, Mechanics and Astronomy | 2003年 / 46卷

关键词：

magnetic structure; transport properties; colossal magnetoresistance effect;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The influence of Gd doping at La-site on the electrical transport properties and the colossal magnetoresistance of La0.7−xGdxSr0.3MnO3 (x=0.00, 0.10, 0.15, 0.20, 0.30, 0.40, 0.50, 0.60, and 0.70) is studied. The experimental results indicate that the transport properties exhibit abnormal behavior under high doping condition. Forx=0.50, we find that a transition from metal to insulator occurs after the occurrence of insulator-metal transition nearTc, which seldom occurs in ABO3 structure. For samplesx=0.60 and 0.70, it exhibits insulator behavior far aboveTc. These abnormal behaviors are attributed to different magnetic background, i.e. the system undergoes a transition from long range ferromagnetic order to the cluster-spin glass state and further to antiferromagnetic order.

引用

页码：371 / 381

页数：10

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