fig7

Figure 7. Domain structures and energy storage properties of FE polymorphic domains by phase-field simulations. (A) BFO-BTO-STO polymorphic domain structure; (B) Energy storage density and efficiency. The figures are quoted with the permission from Pan et al.^[27], copyright 2019, AAAS; (C) Simulations of domain structures and P-E loops at 200, 450, 800 and 1,100 K of Sm-BFO-BTO, showing FE, conventional RFE, SPE-RFE and PE features, respectively. The figure is quoted with the permission from Pan et al.^[28], copyright 2021, AAAS. FE: Ferroelectric; BFO: BiFeO₃; BTO: BaTiO₃; STO: SrTiO₃; RFE: relaxor ferroelectrics; SPE: superparaelectric; PE: paraelectric.