Electroacoustic shear waves in the hollow structure of two piezoelectric

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Resumo

Dispersion properties of electroacoustic waves in the gap structure of two different piezoelectrics are considered. It is shown that in the considered structure PbTiO3 – vacuum gap – BaTiO3 in the presence of a difference of shear wave velocities in piezoelectrics there are no purely symmetric and antisymmetric modes, and the coefficients of the boundary localization of the shear wave will be significantly different.

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Sobre autores

M. Afanasyev

Frayzino branch Kotel’nikov Institute of Radio-engineering and Electronics of RAS

Email: e-vilkov@yandex.ru
Rússia, Fryazino Moscow region, 141190

E. Vilkov

Frayzino branch Kotel’nikov Institute of Radio-engineering and Electronics of RAS

Autor responsável pela correspondência
Email: e-vilkov@yandex.ru
Rússia, Fryazino Moscow region, 141190

O. Byshevsky-Konopko

Frayzino branch Kotel’nikov Institute of Radio-engineering and Electronics of RAS

Email: e-vilkov@yandex.ru
Rússia, Fryazino Moscow region, 141190

G. Chucheva

Frayzino branch Kotel’nikov Institute of Radio-engineering and Electronics of RAS

Email: e-vilkov@yandex.ru
Rússia, Fryazino Moscow region, 141190

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2. 1. Scheme of the problem: A — antisymmetric, S — symmetric modes.

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3. Fig. 2. The spectrum of slit electroacoustic wave modes for two identical 4mm (BaTiO3) class piezo crystals, h = 10-5 cm: A — antisymmetric, S — symmetric modes; 1 and 2 — linear electroacoustic wave spectra at the metallized and nonmetallized boundaries of the piezoelectric crystal.

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4. 3. Dispersion spectra of the localization coefficients of the antisymmetric mode of slit electroacoustic waves in the first (1) and second (2) crystals at =1.01. The upper and lower dashed curves correspond to the antisymmetric and symmetric modes in the case of =1.

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5. 4. Dispersion spectra of the localization coefficients of slit electroacoustic waves in the first (1 — BaTiO3) and second (2 — PbTiO3) crystals; h = 10-6 cm; an enlarged fragment is shown in the insert.

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6. Fig. 5. Frequency dependence on the wave vector in the GHz (a) and MHz frequency ranges (b): 1 — the spectrum of a slit electroacoustic wave, 2 — the spectrum of a shear wave in a limitless piezoelectric BaTiO3.

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