Phase Transitions under the Electric Field in Ternary Ferroelectric Solid Solutions of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 near the Morphotropic Phase Boundary: Electric Approach

Temperature-field phase diagrams in the [001]c and [011]c directions in the cubic coordinate in 24%Pb(In1/2Nb(1/2))O-3-46%Pb(Mg1/3Nb2/3)O-3-30%PbTiO3 (24PIN-46PMN-30PT) and 31PIN-43PMN-26PT near the morphotropic phase boundary have been clarified by measuring the temperature dependences of permittivity under an electric field. Field-induced intermediate orthorhombic and tetragonal phases have been newly found in 24PIN-46PMN-30PT and 31PIN-43PMN-26PT, respectively. The temperature dependences of the remanent polarization have also been determined by polarization-electric field (P-E) hysteresis loop evaluation. On the basis of our experimental results, the phase transition and dielectric anisotropy in PIN-PMN-PT have been discussed.