Abstract
Aging can significantly modify the dielectric, piezoelectric, and ferroelectric performance of ferroelectrics. However, little attention has been paid to the aging effect during ferroelectric-ferroelectric phase transitions that is essentially correlated with real applications. In this letter, the authors report the aging effect evolution between two ferroelectric phases in an acceptor-doped piezoceramics. The results show that aging-induced double hysteresis loops were exhibited in different ferroelectric phases, but disappeared during ferroelectric-ferroelectric phase transitions, suggesting the mechanism that the intrinsic restoring force for the reversible switching of domains caused by the alignment of defect dipoles was weakened due to ferroelectric dipole reorientation.
Highlights
Aging can significantly modify the dielectric, piezoelectric, and ferroelectric performance of ferroelectrics
Little attention has been paid to the aging effect during ferroelectric-ferroelectric phase transitions that is essentially correlated with real applications
The results show that aging-induced double hysteresis loops were exhibited in different ferroelectric phases, but disappeared during ferroelectric-ferroelectric phase transitions, suggesting the mechanism that the intrinsic restoring force for the reversible switching of domains caused by the alignment of defect dipoles was weakened due to ferroelectric dipole reorientation
Summary
Aging can significantly modify the dielectric, piezoelectric, and ferroelectric performance of ferroelectrics. After aging at 80 ◦C for 3 days in the orthorhombic state, the normal P-E hysteresis loop becomes a double one (Fig. 3(a)) due to the defect symmetry along the orthorhombic polarization direction, which can provide an intrinsic restoring force for reversible switching of domains (Fig. 3(a) inset).
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