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. 2021 Oct 21;12(11):1286. doi: 10.3390/mi12111286

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Dispersion curves of the Rayleigh and Sezawa waves electromechanical coupling coefficient ( $k^{2}$ ) calculated for various values of $h_{1} / a$ for the structure SiO₂/IDT/LiNbO₃/diamond/Si. (a) Rayleigh mode; (b) Sezawa mode.