Complete set of elastic, dielectric, and piezoelectric constants of [011] poled rhombohedral Pb(InNb)O-Pb(MgNb)O-PbTiO:Mn single crystals.

Mn modified rhombohedral Pb(InNb)O-Pb(MgNb)O-PbTiO (PIN-PMN-PT:Mn) single crystals poled along [011] crystallographic direction exhibit a "2R" engineered domain configuration, with macroscopic symmetry. The complete sets of material constants were determined using combined resonance and ultrasonic methods, and compared to [001] poled PIN-PMN-PT:Mn crystals. The thickness shear piezoelectric coefficient and electromechanical coupling factor were found to be on the order of ∼3000 pC/N and 0.92, respectively, with longitudinal piezoelectric coefficient and coupling factor being on the order of ∼1050 pC/N and 0.90. Of particular importance is that PIN-PMN-PT:Mn single crystals exhibited high mechanical quality factor  ∼ 1000, comparable to "hard" PZT8 ceramics, which can also be confirmed by the low extrinsic contribution, being ≤2% from the Rayleigh analysis.