Determination of elastic,piezoelectric,and dielectric constants of an R:BaTiO<sub>3</sub> single crystal by Brillouin scattering |
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Authors: | He Xiao-Kang a Zeng Li-Bo a Wu Qiong-Shui a Zhang Li-Yan b Zhu Ke b and Liu Yu-Long |
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Institution: | Electronic Information School,Wuhan University;Institute of Physics,Chinese Academy of Sciences |
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Abstract: | From the sound velocity measured using the Brillouin scattering technique,the elastic,piezoelectric,and dielectric constants of a high-quality monodomain tetragonal Rh:BaTiO3 single crystal are determined at room temperature.The elastic constants are in fairly good agreement with those of the BaTiO3 single crystal,measured previously by Brillouin scattering and the low-frequency equivalent circuit methods.However,their electromechanical properties are significantly different.Based on the sound propagation equations and these results,the directional dependence of the compressional modulus and the shear modulus of Rh:BaTiO3 in the(010) plane is investigated.Some properties of sound propagation and electromechanical coupling in the crystal are discussed. |
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Keywords: | Brillouin scattering elastic and piezoelectric constants Rh:BaTiO3 single crystal |
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