Observation of a change in the form of polarization reversal in a vinylidene fluoride/trifluoroethylene copolymer

Abstract

Polarization reversal in the ferroelectric polymer PVF2 is known to involve chains rotating in 60°steps. In a 75/25 mol % VF 2/VF3 copolymer, chains rotate by two different mechanisms involving either 60°or 180°steps. The extent to which the 180°process contributes to the total polarization reversal is increased by poling.