Properties of SH-SAWs in Layered Piezomagnetic/Piezoelectric Structures covered in a microbeam array

摘要

This paper investigates the shear horizontal surface acoustic wave (SH-SAWs) propagating in layered piezomagnetic/piezoelectric structures covered a microbeam array, which involves a thin piezomagnetic layer bonded perfectly to an unbounded piezoelectric substrate. The beams are modeled by the Euler-Bernoulli theories when they are bending during the piezomagnetic/piezoelectric structures in shear motion. The explicit formulations of SH-SAWs dispersion relations in such layered structure with consideration of magnetoelectrically open and shorted cases are derived. The effects of the microbeam array on the phase velocity are analyzed. The numerical results are presented and discussed. From the results, we can find that the effects of microbeams on the properties of the SH-SAWs are remarkable. The phase velocity decrease with the non-dimensional wave number and increase with the number of microbeams and the thickness of piezomagnetic layer. The analytical method and the results in the paper could be useful to the design of the chemical sensors of magnetoelectric materials.