LAUSR

Very thin and high transparent manganese (Mn) substituted bismuth ferrite (BiFe1−xMnxO3—BFMO) (x = 0, 0.02, 0.04, 0.06, 0.08, 0.10) films deposited on the SnO2:F (FTO)/glass substrate were synthesized by chemical solution deposition technique. The effect of Mn substitution on the microstructure, piezoelectric, optical and magnetic properties was systematically investigated. X-ray diffraction and Raman spectra analysis revealed that the structure transition and lattice distortion of BiFeO3 (BFO) thin film occurred with Mn substitution. SEM images demonstrated that the average grain size of Mn substituted BFO thin film increased with increase of Mn substitution and EDS results confirmed the element composition with presence of Mn in the synthesized thin film. The piezoresponse of BFMO thin film increased with increase of Mn substitution and when Mn substitution x = 0.10, the maximum d33,eff reached to 41.81 pm/V, which is almost 125% higher than the pure BFO thin film. The transmittance and optical band gap decreased with increase of Mn substitution. The BFO thin film with Mn substitution x = 0.10 also showed a lower band gap of 2.64 eV. Furthermore, the Mn substituted BFO thin film show a much higher saturated magnetization compared to pure BFO thin film due to enhanced magnetically driven distortion of spiral spin cycloid induced by Mn substitution.