The orientation‐dependent electromechanical properties were calculated for tetragonal Pb(In 1/2 Nb 1/2 )O 3 –Pb(Mg 1/3 Nb 2/3 )O 3 – PbTiO 3 (PIN–PMN–PT) crystals based on single‐domain data. The maximum electromechanical coupling was found to lie along the polar direction [001], whereas the maximum piezoelectric coefficient was found to occur along [011]. Subsequently, the piezoelectric properties of [011] poled tetragonal PIN–PMN–PT crystals, with an engineered domain configuration (“2T”), were studied using resonance impedance measurement and strain versus electric field ( S – E ) behavior, where the piezoelectric coefficient d 33 and coupling k 33 of [011] poled crystals were found to be on the order of 1000 pC/N and 0.75, respectively. The high d 33 of [011] poled crystals was associated with the high shear coefficient d 15 (∼2300 pC/N) in single domain state. Finally, the piezoelectric and electromechanical properties of [011] domain engineered tetragonal PIN–PMN–PT crystals were investigated as a function of temperature. In contrast to [001] single‐domain PIN–PMN–PT crystals, the piezoelectric coefficient d 33 and coupling k 33 of [011] poled crystals were found to decrease with increasing temperature.
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Li et al. (2010) studied this question.
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