The possibility of polarization recovery in fatigued ferroelectric vinylidene fluoride and trifluoroethylene copolymer films

Simple treatments were made to study the possibility of polarization recovery in fatigued P(VDF–TrFE) films. Annealing at a temperature below or above the Curie point of ferroelectric films would not improve the ferroelectric property of fatigued films, while a long-time rest would induce partially or even fully polarization recovery, though P–E loops obtained from recovered films showed a rounded shape. Some discussions were also given to explain our observations.