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The phase-transition sequence of 0.67Pb(Mg 1/3 Nb 2/3 )-0.37PbTiO 3 (PMN-0.37PT) single crystals driven by the electric ( E ) field and temperature is comprehensively studied. Based on the strain- E field loop, polarization- E field loop, and the evolution of domain configurations, the E field along the [011]  C  induced phase transitions have been confirmed to be as follows: tetragonal ( T ) → monoclinic ( M C  ) → single domain orthorhombic ( O ) phase. As the E field decreases, the induced O phase cannot be maintained and transformed to the M C  phase, then to the coexistence state of M C  and T phases. In addition, the complete sets of dielectric, piezoelectric, and elastic constants for the [011]  C  -poled domain-engineered PMN-0.37PT single crystal were measured at room temperature, which show high longitudinal dielectric, piezoelectric, and electromechanical properties ([Formula: see text], d  33 = 1052 pC/N, and k  33 = 0.766). Our results revealed that the M C  phase plays an important role in the high electromechanical properties of this domain-engineered single crystal. The temperature dependence of the domain configuration revealed that the volume fraction of the M C  phase decreases with temperature accompanied by the reduction of [Formula: see text], d  31 , and k  31 due to the substantially smaller intrinsic properties of the T phase.

physical review. b./physical review. b

Temperature and electric-field induced phase transitions, and full tensor properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mo>[</mml:mo><mml:mn>011</mml:mn><mml:mo>]</mml:mo></mml:mrow><mml:mi>C</mml:mi></mml:msub></mml:math>-poled domain-engineered tetragonal<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mrow><mml:mn>63</mml:mn><mml:mi mathvariant="normal">Pb</mml:mi></mml:mrow><mml:mrow…

Temperature and electric-field induced phase transitions, and full tensor properties of[011]C-poled domain-engineered tetragonal0.63Pb