fig3

Figure 3. Synthesis and characterization of freestanding ferroelectric BaTiO₃ (~25 nm)/BaZrO₃ (~30 nm) membrane heterostructures. (A) Schematic figures of the as-transferred freestanding BaZrO₃ membrane (5 × 5 mm²) and the following thin-film growth of ferroelectric BaTiO₃ for manufacturing freestanding ferroelectric BaTiO₃/BaZrO₃ membrane heterojunctions on mica substrates. (B) The XRD analyses of the as-grown freestanding ferroelectric BaTiO₃/BaZrO₃ membrane heterostructures on mica substrates. The inset indicates photographs of the as-fabricated BaTiO₃/BaZrO₃ membrane heterojunctions. (C and D) Rocking-curve results of the BaZrO₃ (002) and BaTiO₃ (200) peaks in freestanding BaTiO₃/BaZrO₃ bilayer membranes. (E) The AFM topography images of the as-grown freestanding ferroelectric BaTiO₃/BaZrO₃ membrane heterostructures. (F) RSMs of freestanding BaZrO₃/BaTiO₃ bilayer membranes around the (-103) Bragg peaks of the freestanding BaZrO₃ membranes.