Fig. 2: Temperature-electric field phase diagram of PZO polymorphic domain.

a Phase diagram of prototype PZO polymorphic domain as a function of temperature-electric field, b AFE phase domain, c Mixed phase domain, d FE phase domain. (Domain structures below the phase diagram are the local results in the 256Δx × 256Δy × 1Δz. Green points are AFE-FE phase transition points from PZO ceramics experiments25).