Crystal structure and highly enhanced ferroelectric properties of (Tb, Cr) co-doped BiFeO3 thin films fabricated by a sol–gel method

BiFeO3 (BFO), Tb-doped BiFeO3 (BTFO) and Tb–Cr co-doped BiFeO3 (BTFCO) thin films were successfully prepared on SnO2: F (FTO)/glass substrates by a sol–gel method. The influence of Tb and Cr co-doping on the structure, leakage current, charge defects, dielectric and ferroelectric properties of the BTFCO thin film was investigated systematically. X-ray diffraction (XRD) and Raman spectroscopy results clearly reveal the structure transition and...