| 层状铁电体Ba_(1-x)Bi_(2+x)Ti_xNb_(2-x)O_9的结构相变研究 |
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| 引用本文： | 韩杰 李守春. 层状铁电体Ba_(1-x)Bi_(2+x)Ti_xNb_(2-x)O_9的结构相变研究[J]. 光散射学报, 1999, 11(4): 347-350 |
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| 作者姓名： | 韩杰 李守春 |
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| 作者单位： | [1]吉林大学超硬材料国家重点实验室 [2]长春科技大学 |
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| 基金项目： | 国家自然科学基金!资助 ( 5 8931 0 4 0，1 9774 0 2 5 ) |
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| 摘 要： | 本文应用拉曼光谱方法研究了Ba1-xBi2+xTixNb2-xO9的结构相变。与x≠0的情况相比,x=0的情况BaBi2Bn2O9表现出了明确不同的拉曼光谱。前者有与Aurivillius层状铁电体家族的铁电相相似的拉曼光谱。因此认为BaBi2Nb2O9发生了铁电—非铁电相变。此外,用内模方法对层次铁电体Ba1-xBi2+xTixNb2-xO9的拉曼振动模式进行了初步的指认
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| 关 键 词： | 拉曼光谱 结构相变 层状铁电体 |
Phase Transition of Layered Compound Ba_(1-x)Bi_(2+x)Ti_xNb_(2-x)O_9 |
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| HAN Jie,ZOU Guang tian,ZHAO Yong nian,GE Zhong jiu ,LI Shou chun. Phase Transition of Layered Compound Ba_(1-x)Bi_(2+x)Ti_xNb_(2-x)O_9[J]. Chinese Journal of Light Scattering, 1999, 11(4): 347-350 |
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| Authors: | HAN Jie ZOU Guang tian ZHAO Yong nian GE Zhong jiu LI Shou chun |
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| Affiliation: | HAN Jie,ZOU Guang tian,ZHAO Yong nian,GE Zhong jiu 1,LI Shou chun 2 |
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| Abstract: | Structure phase transition of Ba 1-x Bi 2+x Ti xNb 2-x O 9have been observed in the Raman spectra. For the case with x=0, the end member BaBi 2Nb 2O 9 displays a clearly distinct Raman spectrum with respect to the cases with x≠0. Later have similar Raman spectra as those of other layered ferroelecterics. Therefore it is considered that a ferroelectric nonferroelectric phase transition happened for the case of BaBi 2Nb 2O 9. A preliminary assignation of vibration modes is given by internal mode approach. |
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| Keywords: | Raman Spectra Structure Phase Transition Layered ferroelectrics |
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