Fig. 4: Microscopic evolution of the re-entrant transition revealed by TEM observations and CBED patterns along the [001], [011], and [111] beam incidences at room temperature (a) and a low temperature of 103 K (b).
From: Re-entrant relaxor–ferroelectric composite showing exceptional electromechanical properties

Upon cooling, the room-temperature long-range ordered ferroelectric state (RT-FE) with the zero-order 4-mm symmetry (T phase) undergoes a re-entrant transition, forming short-range ordered polar nanodomains with zero-order m symmetry (O phase) in the large ferroelectric domains (LT-RE)