Transport properties in La0.7−x Gd x Sr0.3MnO3 system

  • Guizhen Gao
  • Ning Liu
  • Huanyin Guo
  • Zhirang Cai
  • Zhensheng Peng
  • Wei Tong
  • Changjin Zhang
  • Yuheng Zhang
Article
  • 36 Downloads

Abstract

The influence of Gd doping at La-site on the electrical transport properties and the colossal magnetoresistance of La0.7−x Gd x Sr0.3MnO3 (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 nearT c, which seldom occurs in ABO3 structure. For samplesx=0.60 and 0.70, it exhibits insulator behavior far aboveT c. 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.

Keywords

magnetic structure transport properties colossal magnetoresistance effect 

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Copyright information

© Science in China Press 2003

Authors and Affiliations

  • Guizhen Gao
    • 1
  • Ning Liu
    • 1
    • 2
  • Huanyin Guo
    • 1
  • Zhirang Cai
    • 1
  • Zhensheng Peng
    • 1
  • Wei Tong
    • 2
  • Changjin Zhang
    • 2
  • Yuheng Zhang
    • 2
  1. 1.Department of PhysicsSuzhou Advanced Normal CollegeSuzhouChina
  2. 2.Structure Research LaboratoryUniversity of Science and Technology of ChinaHefeiChina

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