Modeling of Love wave propagation in the diversified piezomagnetic layered structure under impulsive force due to a point source

Abstract

Love wave propagation through smart materials is an interesting research area due to its possible applications in seismic acoustic wave (SAW) devices. Apart from existing research, we considered sinusoidal diversity in the piezomagnetic materials under the effect of an impulsive point source to elucidate the hidden characteristics of Love wave behavior. As a two-dimensional problem, the governing equations of motion are laid down for the proposed model and deduced by Fourier transformation. The frequency relation is derived by using prescribed boundary conditions and the well-known properties of Green’s function. The obtained frequency relation is deduced into the conventional form of the Love wave dispersion, validating the proposed model. The fundamental mode along with two higher-order modes of Love wave dispersion is investigated analytically to demonstrate the parametric effects on frequency curves. Analytical findings recommended that the functional gradient parameters, piezomagnetic constants, magnetic permeabilities, and amplify gradient parameters affected the phase velocity of the Love wave extensively. This finding suggested that it is important to take into account the suppressing effects of the parameters when manufacturing transducers and piezomagnetic sensors to achieve better performance. Moreover, the outcomes of this study may be considered to secure the high performance of the SAW devices.