Figure 1

Crystal structures of the BLT, BLCT and BLFCT films.

(a) The crystal structure of BLT. The structure shows that La substitutes specific Bi sites of BiT. (b) The X-ray θ–2θ diffraction patterns for BLT, BLCT and BLFCT epitaxial films on STO (001). The full width at half maximum (FWHM) for the (008) peak in (c) the BLCT and (d) BLFCT films on STO.