Antiferroelectric-ferroelectric phase transitions and polarization dynamics in lead-free NaNbO3-based antiferroelectrics

The defining feature of antiferroelectric materials is the unique phase transition from antiferroelectric to ferroelectric states induced by an external electric field, which is accompanied by a significant increase in polarization and strain. The aim of this experiment is to investigate the mechanisms of these transitions in newly emerging lead-free antiferroelectric materials. In particular, the focus is on the origin of reversibility. This goal will be achieved by studying the structural/microstructural behaviour of three representative groups of antiferroelectrics in situ under electric field application while simultaneously measuring the macroscopic response. We expect to find structural origins responsible for reversibility, which is a prerequisite for the use of these materials in applications.