Abstract
(111)-, (101)-, and (001)-oriented polycrystalline BiFeO3 films were fabricated on
rolling-assisted biaxially textured substrates (RABiTS) with appropriate, buffer layer
engineering of heteroepitaxially grown buffer multilayers on RABiTS. The crystallographic
orientation and polarization direction were confirmed using X-ray diffraction and
piezoresponse force microscopy (PFM), respectively. All the films exhibited excellent
ferroelectric properties. Switching spectroscopy PFM demonstrated that the switching
polarization in (111)-oriented polycrystalline BiFeO3 films is higher than (101) or (001)
oriented films. These high-quality, BiFeO3 films on low-cost, flexible, biaxially textured
metallic tapes with controllable orientation and polarization are attractive for application in
flexible ferroelectric devices.
