Lamb waves propagation in layered piezoelectric/piezomagnetic plates

Area of Science:

• Materials Science
• Solid Mechanics
• Electromagnetism

Background:

• Piezoelectric (BaTiO3) and magnetostrictive (CoFe2O4) materials are crucial for advanced devices.
• Understanding wave propagation in layered magneto-electro-elastic structures is essential for device optimization.

Purpose of the Study:

• To develop a dynamic solution for harmonic wave propagation in magneto-electro-elastic plates.
• To analyze the influence of material stacking and thickness ratios on wave characteristics.

Main Methods:

• State-vector approach to derive the propagator matrix for layered structures.
• Ordinary differential equations to determine wave propagation properties.
• Imposition of traction-free boundary conditions on plate surfaces.

Main Results:

• Dispersion curves for piezoelectric-piezomagnetic plates were generated.
• The impact of varying thickness ratios and stacking sequences on dispersion curves was quantified.
• The influence of these parameters on the magneto-electromechanical coupling factor was demonstrated.

Conclusions:

• The study provides a method for analyzing wave propagation in complex magneto-electro-elastic plates.
• Results highlight the importance of structural design (stacking sequence, thickness ratio) for tailoring device performance.
• Findings are applicable to the design of high-performance surface acoustic wave (SAW) devices.