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首页> 外文期刊>Solid State Communications >A comparative study of dielectric and Raman spectroscopy of Pb(Yb1/2Ta1/2)O-3 and Pb(Yb1/2Nb1/2)O-3
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A comparative study of dielectric and Raman spectroscopy of Pb(Yb1/2Ta1/2)O-3 and Pb(Yb1/2Nb1/2)O-3

机译：Pb（Yb1 / 2Ta1 / 2）O-3和Pb（Yb1 / 2Nb1 / 2）O-3的介电和拉曼光谱比较研究

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摘要

A comparative study of the properties of two highly ordered lead based complex perovskites Pb(Yb1/2Ta1/2)O-3 and Pb(Yb1/2Nb1/2)O-3 has been carried out through x-ray diffraction, dielectric and Raman scattering measurements. These two compounds differ significantly in their structure, dielectric response and phonon vibration although the ionic radii and valencies are same for Ta and Nb. The room temperature x-ray diffraction pattern and Raman spectra show that the symmetry of lead ytterbium tantalate is lower than that of lead ytterbium niobate. The Raman spectra of Pb(Yb1/2Ta1/2)O-3 also indicates the presence of local distortion in the lattice which may be one of the factors responsible for the existence of a secondary transition. (c) 2006 Elsevier Ltd. All rights reserved.
机译：通过X射线衍射，电介质和拉曼光谱对两种高度有序的铅基复合钙钛矿Pb（Yb1 / 2Ta1 / 2）O-3和Pb（Yb1 / 2Nb1 / 2）O-3的性能进行了比较研究。散射测量。尽管Ta和Nb的离子半径和化合价相同，但这两种化合物在结构，介电响应和声子振动方面存在显着差异。室温X射线衍射图和拉曼光谱表明钽酸铅lead的对称性低于铌酸铅lead的对称性。 Pb（Yb1 / 2Ta1 / 2）O-3的拉曼光谱也表明晶格中存在局部畸变，这可能是导致二次跃迁存在的因素之一。 （c）2006 Elsevier Ltd.保留所有权利。

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