Lattice distortion under an electric field in BaTiO3 piezoelectric single crystal
Lattice distortion under an electric field in BaTiO3 piezoelectric single crystal
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DOI：
10.1088/0953-8984/21/21/215903
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
R. Tazaki;D. Fu;M. Itoh;M. Daimon;S. Koshihara
中科院分区：
文献类型：
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作者：
R. Tazaki;D. Fu;M. Itoh;M. Daimon;S. Koshihara
用同步辐射X射线探测了BaTiO_3铁电晶体单畴在电场作用下的晶格畸变。用高角衍射观察到的晶格常数随电场的变化显示出压电效应的线性响应性质。当沿着自发极化方向施加电场时，晶格的c轴以d33 = 149 ± 54 pm V−1和d31 = −82 ± 61 pm V−1的速率伸长，晶格的a轴以d33 = 149 ± 54 pm V−1和d31 = −82 ± 61 pm V−1的速率收缩;这些分别代表BaTiO 3晶体的纵向和横向压电系数。这些结果提供了一个洞察的内在压电响应的晶格尺度上的钛酸钡，已被广泛用于探索高性能的无铅压电合金。
Lattice distortions under an electric field in a mono-domain of BaTiO3 ferroelectric crystal have been detected with synchrotron x-ray radiation. The variation of the lattice constant with an electric field observed with high angle diffraction shows a linear response nature of the piezoelectric effect. When an electric field is applied along the spontaneous polarization direction, the c-axis of the lattice elongates and the a-axis of the lattice shrinks at a rate of d33 = 149 ± 54 pm V−1 and d31 = −82 ± 61 pm V−1; these represent the longitudinal and transverse piezoelectric coefficients of BaTiO3 crystal, respectively. These results give an insight into the intrinsic piezoelectric response on the lattice scale in BaTiO3 that has been widely used to explore high performance lead-free piezoelectric alloys.