| La0.8Sr0.2Co1-xFexO3材料局域结构的研究 |
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| 引用本文： | 吴成国,武文远,龚艳春,杜华月,陈蓉. La0.8Sr0.2Co1-xFexO3材料局域结构的研究[J]. 低温物理学报, 2011, 0(4): 313-316 |
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| 作者姓名： | 吴成国 武文远 龚艳春 杜华月 陈蓉 |
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| 作者单位： | 解放军理工大学理学院; |
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| 摘 要： | 采用溶胶-凝胶法制备了La0.8Sr0.2Co1-xFexO3样品,并测量了各样品的X射线衍射谱（XRD）和X射线吸收精细结构（XAFS）谱。XRD分析研究发现Fe的掺杂引起了La0.8Sr0.2CoO3材料相分离;在前期对X射线吸收精细结构谱近边分析的基础上,进一步分析扩展边X射线吸收精细结构谱,表明在La0.8Sr...
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| 关 键 词： | EXAFS 劈裂 局域结构 溶胶-凝胶 |
LOCAL STRUCTURE FEATURES OF La_(0.8)Sr_(0.2)Co_(1-x)Fe_xO_3 BY EXAFS |
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| WU Cheng-guo WU Wen-yuan GONG Yan-chun DU Hua-yue CHEN Rong Institute of Science,PLA University of Science , Technology,nanjing. LOCAL STRUCTURE FEATURES OF La_(0.8)Sr_(0.2)Co_(1-x)Fe_xO_3 BY EXAFS[J]. Chinese Journal of Low Temperature Physics, 2011, 0(4): 313-316 |
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| Authors: | WU Cheng-guo WU Wen-yuan GONG Yan-chun DU Hua-yue CHEN Rong Institute of Science PLA University of Science Technology nanjing |
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| Affiliation: | WU Cheng-guo WU Wen-yuan GONG Yan-chun DU Hua-yue CHEN Rong Institute of Science,PLA University of Science and Technology,nanjing 210011 |
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| Abstract: | The local structures around Co and Fe ions in La0.8Sr0.2Co1-xFexO3 prepared by sol-gel method were investigated by XAFS.XRD shows that in La0.8Sr0.2Co1-xFexO3 samples has almost all of the diffraction peaks are splitted,implying that there are probably two different crystal structures in Fe-doped La0.8Sr0.2CoO3 samples.The results of EXAFS indicate that there are four bands such as Co3+-O、Co4+-O、Fe3+-O and Fe4+-O bands in La0.8Sr0.2Co1-xFexO3 samples,Co3+-O band and Fe3+-O band have almost length,Co4+-O band and Fe4+-O land have almost length,but the length of the four bands are not equal,thus these results induce two different crystal structures in Fe-doped La0.8Sr0.2CoO3 samples. |
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| Keywords: | EXAFS split local structure the sol-gel method |
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