A A Zakharenko
Keywords: Magneto-electro-elastic thin film, magnetoelectric effect, dispersive acoustic anti-plane waves, zero-order modes
Abstract: This report copes with the examination of dispersive shear-horizontal (SH) wave propagation in the piezoelectromagnetic (PEM) thin film. The studied plate must represent an anisotropic solid with bulk properties. Its symmetry must be hexagonal pertaining to 6 mm point group of crystal symmetries. The changes in the velocities of the inspected dispersive waves versus the dimensionless plate thickness kd are graphically examined for some values of the coefficient of the magnetoelectromechanical coupling (CMEMC). The obtained results have clarified that the inspected waves are slightly dispersive when the CMEMC < 0.2. The dispersion must be significant for larger values. It was found that the zero-order mode of one inspected dispersive wave can commence only at some kd > 0. The same mode of the second inspected dispersive wave can begin at kd = 0. For a very large value of kd, the wave velocities approach the speed of the nondispersive surface Bleustein-Gulyaev-Melkumyan wave. Also, these academic results can be useful for design of dispersive wave technical devices: chemi-bio-sensors, labs on tiny chips, filters, dispersive delay lines, etc., and their further prospective miniaturization.
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