Energy propagation properties of piezoelectric surface waves on cubic crystals

Abstract

The wave surface of piezoelectric surface waves propagating on the Z‐cut metal‐coated surface of a semi‐infinite cubic crystal (class 4̄3m or 23) is calculated from the envelope of equiphase planes using the Lagrange multiplier method. It is found that the wave surface shows the cusps if the crystal is in the Cu region (c₁₂≳c₁₁−2c₄₄) and has strong anisotropy.