Impact of Structural Imperfections on Wave Scattering at the Interface of Thermally Conducting Piezoelectric and Piezomagnetic Solids

The present article analyzes the effects of different boundary conditions on the reflection and transmission of quasi-plane (QP) waves at the junction of thermally conducting piezoelectric and piezomagnetic media. Commonly used piezoelectric (BaTiO3) and piezomagnetic (CoFe2O4) materials are chosen to study the impact of varied interfacial conditions (welded, completely debonded, normal stiffness boundary, transverse stiffness boundary, electrically and magnetically imperfect boundary conditions, thermal contact conductance, and slip boundary). Three different theories of thermoelasticity, i.e., Biot, Lord and Shulman (LS) theory, and Green and Lindsay (GL) theory, are used to compare the obtained results. Ten waves are observed upon the incidence of the QP wave at the boundary of the piezoelectric and piezomagnetic media, which are the QP wave, quasi-shear vertical (QSV) wave, electroacoustic (EA) wave, magnetic potential (MP) wave, and thermal (T) wave in the piezoelectric medium, and electric potential (EP), magnetoacoustic (MA) along with the coupled QP, QSV, and T waves in piezomagnetic medium. The closed form of reflection and refraction coefficients for the aforementioned boundary conditions are derived. The findings of this study provide insights that may guide the design and optimization of magnetoelectric transducers and related devices, contributing to advancements in sensing, energy harvesting, and signal processing technologies.