| Nonlinear current-voltage characteristics originated from phase segregation and micro-cracks in polycrystalline La_（0.67）Ba_（0.33）MnO_3 |
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| 引用本文： | 崔益民,刘伟,潘晖.Nonlinear current-voltage characteristics originated from phase segregation and micro-cracks in polycrystalline La_（0.67）Ba_（0.33）MnO_3[J].中国稀土学报(英文版),2011(7):716-718. |
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| 作者姓名： | 崔益民 刘伟 潘晖 |
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| 作者单位： | Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education) and Department of Physics;Beijing University of Aeronautics and As-tronautics; |
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| 基金项目： | supported by the National Natural Science Foundation of China (10975103) |
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| 摘 要： | Polycrystalline La0.67Ba0.33MnO3 bulk samples were annealed in flowing 95%Ar:5%H2 (AH) mixed gas at 973 K for different time respectively. The influence of the annealing time on the current-voltage properties was systematically investigated. Linear current-voltage characteristics were observed in the as-prepared and the 10 h annealed samples, and nonlinear current-voltage characteristics was found in the 100 h annealed sample. At the same time, segregation of impurity phase and micro-cracks were found on the surfaces of the 100 h annealed samples, which was testified to be Ba ion impurity. Analysis showed that the changes of electronic properties were caused by barium ion im-purities and micro-cracks in the 100 h annealed sample.
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| 关 键 词： | La0.67Ba0.33MnO3 hydrogen annealing phase segregation current-voltage characteristics rare earths |
Nonlinear current-voltage characteristics originated from phase segregation and micro-cracks in polycrystalline La_(0.67)Ba_(0.33)MnO_3 |
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| CUI Yimin,LIU Wei,PAN Hui.Nonlinear current-voltage characteristics originated from phase segregation and micro-cracks in polycrystalline La_(0.67)Ba_(0.33)MnO_3[J].Journal of Rare Earths,2011(7):716-718. |
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| Authors: | CUI Yimin LIU Wei PAN Hui |
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| Affiliation: | CUI Yimin,LIU Wei,PAN Hui (Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education) and Department of Physics,Beijing University of Aeronautics and As-tronautics,Beijing 100191,China) |
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| Abstract: | Polycrystalline La0.67Ba0.33MnO3 bulk samples were annealed in flowing 95%Ar:5%H2 (AH) mixed gas at 973 K for different time respectively. The influence of the annealing time on the current-voltage properties was systematically investigated. Linear current-voltage characteristics were observed in the as-prepared and the 10 h annealed samples, and nonlinear current-voltage characteristics was found in the 100 h annealed sample. At the same time, segregation of impurity phase and micro-cracks were found on th... |
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| Keywords: | La0 67Ba0 33MnO3 hydrogen annealing phase segregation current-voltage characteristics rare earths |
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