Piezoelectrically‐induced switching of 90° domains in tetragonal BaTiO3 and PbTiO3 investigated by micro‐Raman spectroscopy
Piezoelectrically‐induced switching of 90° domains in tetragonal BaTiO3 and PbTiO3 investigated by micro‐Raman spectroscopy
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通过显微拉曼光谱研究四方 BaTiO3 和 PbTiO3 中压电诱导的 90° 域切换
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
D. Lam
中科院分区：
文献类型：
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作者：
Z. Li;C. M. Foster;X. Dai;X. Xu;S. Chan;D. Lam
在沿着特定晶轴方向施加应力时，四相BaTiO_3和PbTiO_3中的90°铁电畴发生了畴变。对于BaTiO 3，通过施加平行于a轴的1.1MPa的应力从孪晶样品获得单畴晶体，并且通过施加平行于c轴的1.22MPa的应力诱导孪晶边界。在高温下，在PbTiO 3中观察到类似的压电诱导畴变。我们通过微拉曼光谱观察到与畴转换相关的晶轴旋转。这些结果与畴变的光学显微镜图像一致，这证明了微拉曼光谱用于研究铁电畴结构的有用性。描述了压电耦合系统中畴变的唯象处理。
Domain switching of 90° ferroelectric domains in tetragonal BaTiO3 and PbTiO3 is induced by the application of stress along specific crystallographic axes. For BaTiO3, single‐domain crystals are obtained from twinned specimens by the application of ∼1.1 MPa of stress parallel to the a axis and twin boundaries are induced by application of ∼0.22 MPa of stress parallel to the c axis. Similar piezoelectrically‐induced domain switching was observed in PbTiO3 at elevated temperature. We observed the rotation of the crystallographic axes associated with domain switching via micro‐Raman spectroscopy. These results were consistent with optical microscope images of the domain switching which demonstrates the usefulness of micro‐Raman spectroscopy for the study of ferroelectric domain structures. A phenomenological treatment of domain switching in a piezoelectrically‐coupled system is described.