Time-resolved crystal structure analysis of resonantly vibrating langasite oscillator
Time-resolved crystal structure analysis of resonantly vibrating langasite oscillator
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DOI：
10.7567/jjap.55.10tc05
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发表时间：
2016-08
影响因子：
1.5
通讯作者：
S. Aoyagi;H. Osawa;K. Sugimoto;S. Takeda;C. Moriyoshi;Y. Kuroiwa
中科院分区：
文献类型：
--
作者：
S. Aoyagi;H. Osawa;K. Sugimoto;S. Takeda;C. Moriyoshi;Y. Kuroiwa
通过时间分辨晶体结构分析，揭示了交变电场作用下y型langasite谐振振荡器的瞬时晶体结构，以了解压电的微观机理。电场作用下的厚度剪切晶格应变被共振效应放大了~ 103倍。晶格振动涉及到高四和Ga0.5Si0.5O4四面体的变形，并伴随着特定氧原子沿电场方向的原子位移。高四和Ga0.5Si0.5O4四面体的变形增强了菱叶石的压电性。
The momentary crystal structure of a Y-cut langasite oscillator resonantly vibrating under an alternating electric field is revealed by time-resolved crystal structure analysis to understand the microscopic mechanism of piezoelectricity. The thickness-shear lattice strain under an electric field is amplified ∼103 times by the resonant effect. The lattice vibration involves the deformation of GaO4 and Ga0.5Si0.5O4 tetrahedra accompanied by atomic displacements of specific oxygen atoms along the electric field. The deformation of GaO4 and Ga0.5Si0.5O4 tetrahedra enhances the piezoelectricity of langasite.