fig1
Figure 1. Design of multistate BFO nanocomposites. (A) Polar plots of free energies for BFO under stress-free conditions (left) and under an IP compressive strain of -1.3% combined with an OOP tensile stress of 9.12 GPa (right). The right panel is similar to the case of a high in-plane compressive strain of -4%, demonstrating comparable stabilization of the super-tetragonal phase; (C) Schematic of the proposed nanocomposite structure consisting of a substrate layer, a film layer of a BFO pillar surrounded by a dielectric matrix, and an air layer; (D) Designed energy density profiles of a plain BFO film and a BFO pillar embedded in a dielectric matrix; (E) Electric hysteresis loop of the designed BFO nanocomposite film. BFO: BiFeO3; IP: in-plane; OOP: out-of-plane.
