Structural evidence for the nonmonotonic trend of TC in tetragonal PbTiO3BiScO3 solid solutions

Structural evidence for the nonmonotonic trend of TC in tetragonal PbTiO3BiScO3 solid solutions
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DOI：
10.1063/1.3456389
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发表时间：
2010-06
期刊：
Applied Physics Letters
影响因子：
4
通讯作者：
Jun Chen;K. Nittala;Jacob L. Jones;Penghao Hu;X. Xing
Jun Chen;K. Nittala;Jacob L. Jones;Penghao Hu;X. Xing
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
Jun Chen;K. Nittala;Jacob L. Jones;Penghao Hu;X. Xing

文献摘要

被引文献

相似文献

高TC压电材料(1−x)PbTiO_3_xBiScO_3在四方相中表现出非单调的TC变化趋势。为了理解这一行为，用中子粉末衍射法研究了(1−x)PbTiO_3-_xBiScO_3固溶体的结构。Pb/Bi和Ti/Sc的阳离子位移表现出耦合性质，且受BiScO_3取代量的不同影响不同。其TC的非单调趋势与计算的整个四方范围内的自发极化是定量相关的。铋替代的独特作用不仅有助于提高铅/铋的极化分量，而且还有助于提高转变温度。
High-TC piezoelectric (1−x)PbTiO3xBiScO3 shows a nonmonotonic trend of TC in the tetragonal phase with respect to content of BiScO3. To understand this behavior, the structure of (1−x)PbTiO3xBiScO3 solid solutions is studied by means of neutron powder diffraction. The cation displacements of Pb/Bi and Ti/Sc exhibit a coupling property and a different impact by the substitution content of BiScO3. Its nonmonotonic trend of TC is quantitatively related to the calculated spontaneous polarization in the whole tetragonal range. The unique role of Bi-substitution not only contributes to enhance the component of polarization of Pb/Bi but also to increase the TC.