Dispersion properties of volume shear waves in sharuwato periodic medium type metal piezoelectric–dielectric

DOI: 10.31673/2412-9070.2024.044751

Abstract

The paper proposes methods of constructing dispersion relations for bulk acoustoelectric waves propagating in layered-periodic media formed by the repetition of a piezo-dielectric metallized "generating" package.
A method of constructing dispersion relations for volumetric acoustoelectric shear waves propagating in layered-periodic media formed by repeating a materialized package consisting of two different piezoelectric layers separated by a dielectric layer is proposed. Dispersion ratios for different geometries and materials included in the package were numerically analyzed. The use of CdS and ZnO was considered as piezoelectric materials. Dispersion ratios were obtained numerically, which allow analyzing the zonal structure of the propagation spectrum of acoustic-electric waves.
Numerical calculations were carried out using the condition of metallization on the outer surfaces of the package, the dispersion relations are given through the elements of the second-order transmission matrices. Numerical analysis showed that the boundaries of the zones do not intersect in the range of changes in wave number and circular frequency. In the case of similarity of the physical properties of the piezoelectric layers, the crossing of transmission zones is observed for the case of a symmetric medium. As a result of the conducted numerical modeling, a shift of the spectrum of volume waves to the high-frequency region was established.
In a wide range of changes in frequency and wave number, numerical studies were carried out and the regularities of the propagation of volume waves in various structures were described. The influence of the physical-mechanical and geometrical parameters of the layers on the structure of the blocking and transmission zones was studied, as well as the influence of the piezo effect on the location of the zone boundaries when the relative thickness of the layers in the package changed.

Keywords: bulk shear waves; periodically layered medium; piezoelectric; dielectric; transmission zones.