Scattering of plane SH waves on an irregular piezomagnetic stratum-substrate structure.

• Scattering of SH wave on an irregular surface of the piezomagnetic stratum-substrate structure is studied. • The expressions of frequency relation and group velocity of SH wave is derived in closed form for both MO and MS cases. • The expressions of mechanical displacement and magnetic potential are derived for three different shaped irregularities. • Validation of the derived results of both cases is found in well agreement with the classical Love wave equation. • The impact of material properties is depicted on the phase velocity and group velocity of SH wave for both MO and MS cases. The present paper investigates the scattering phenomenon of horizontally polarized Shear wave on an irregular surface of the piezomagnetic stratum lying over a piezomagnetic substrate. The expressions of frequency relation and group velocity of scattered Shear wave on the considered piezomagnetic stratum-substrate structure are deduced for magnetically open and magnetically short cases by inducing appropriate boundary conditions. A closed form expressions of reflected mechanical displacement and reflected magnetic potential function related to stratum and substrate are also determined for three different shaped irregularities (rectangular shaped, parabolic shaped and triangular shaped) by employing perturbation technique and residue theorem for both magnetically open and short cases. The efficacy of piezomagnetic coupling parameter, vertical irregular parameter due to presence of surface irregularities is portrayed on the phase velocity, group velocity, reflected mechanical displacement and reflected magnetic potential function related to the stratum for both magnetically open and short conditions graphically. A comparative study is also made to examine the impact of different shaped irregularities on the reflected mechanical displacement and reflected magnetic potential function of the stratum. [ABSTRACT FROM AUTHOR]