Role of magnetic ordering in the phase coexistence at the structural instability of the multiferroic BiFeO₃–PbTiO₃

A promising approach for obtaining a large magnetoelectric response at room temperature in single-phase materials is to make use of phase-change phenomena structural instabilities multiferroic state. This the case perovskites showing morphotropic phase boundary (MPB) between ferroelectric polymorphs with differentiated magnetic orderings, like BiFeO3–PbTiO3. Indeed, distinctive effects were recently shown Mn-modified BiFeO3–PbTiO3, associated electric field-induced transition coexisting MPB phases. We report here analogous under field 0.7BiFeO3–0.3PbTiO3, which shed light on reversibility and role ordering coexistence instability characteristic MPB. Results demonstrate field-driven phenomena.