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Experimental measurement of the electroelastic effect in thickness-mode langasite resonators

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5 Author(s)
Haifeng Zhang ; Dept. of Eng. Technol., Univ. of North Texas, Denton, TX, USA ; Turner, J.A. ; Jiashi Yang ; Kosinski, J.A.
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The electroelastic effect describes the shift in resonant frequency that a resonator experiences as a result of the application of a dc electrical field. We report on experimental measurements of the electroelastic effect observed in fourteen plano-plano configuration thickness-mode langasite (La3Ga5SiO14) resonators. The orientations of the fourteen samples provide a sufficient data set to extract all eight of the third-order piezoelectric constants of this material. The role of this type of measurement in determining third-order piezoelectric constants is discussed. We compare the experimentally observed behavior to that predicted when using the langasite material constants currently available in the literature.

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:60 ,  Issue: 5 )