Effect of mosaicity on energy storage performance of epitaxial BaZr0.35Ti0.65O3 films

Abstract

It is well known that the macroscopic behaviors of ferroelectric materials were tightly related to their microstructure features. In this work, the mosaicity of epitaxial BaZr0.35Ti0.65O3 films was studied by analyzing the broadening effect of reciprocal lattice points. The smaller transverse block size (Dx) and relatively large tilt angle of crystal blocks (Δω) were suggested to promote the delay saturation of polarization. Meanwhile, the electric breakdown strength (EB) could be enhanced in the samples with smaller Dx, which can further improve the energy storage density efficiently. Ultimately, an ultrahigh recoverable energy density (Wrec) of 100.8 J/cm3 was achieved in the BaZr0.35Ti0.65O3 films prepared at 700 °C.