Antiferroelectric to Ferroelectric Crossover and Energy Storage Properties of (Pb 1− x La x )(Zr 0.90 Ti 0.10 ) 1− x /4 O 3 (0.02 ≤ x ≤ 0.04) Ceramics

Polarization switching behavior and energy storage performances of (Pb 1− x La x )(Zr 0.90 Ti 0.10 ) 1− x /4 O 3 ( PLZT x /90/10) ceramics with La compositions across the ferroelectric/antiferroelectric phase boundary, which show variable amount of antiferroelectric ( AFE ) orthorhombic and ferroelectric ( FE ) rhombohedral phases, were investigated. A low AFE to FE switching field was obtained and its value could be adjusted by La chemical modification. While the PLZT system evolves from a FE state to an AFE state as a function of La content and from an AFE state to a FE state as a function of the applied electric field, the recoverable energy ( W re ) and loss energy ( W loss ) range between two limits whose lower and higher values are obtained for PLZT composition in AFE state and FE state, respectively. In terms of the extent of La‐modification, the W re has been enhanced from 0.819 J/cm 3 (for PLZT 2/90/10 and electric field of ~30 kV/cm) to the highest value of 1.85 J/cm 3 (for PLZT 3.5/90/10 and electric field ~65 kV/cm), followed by their subsequent reduction.