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1. Piezoelectric Property

   Linked via "high-frequency excitation"

   The magnitude of the piezoelectric response is quantified by the piezoelectric strain coefficients, often denoted by $d_{ijk}$. These coefficients form a fourth-rank tensor, although for many practical applications involving simplified geometries, they are reduced to a $6 \times 3$ matrix relating the stress/strain components to the polarization/electric field components.
   A crucial, though often overlooked, parameter is the **[Electr…