Magnetic and structure property correlations in Mn-doped BiFeO₃ system

In this paper, the synthesis of BiFe_1−xMn_xO₃ (x = 0.05, 0.10, 015, 0.20) thin films using a sol–gel technique was proposed. The structural characteristics of the thin films were investigated by X-ray diffraction (XRD), indicating a structural transition from typical rhombohedral-R3c (BiFeO₃) to orthorhombic-Pbmn (BiFe_0.80Mn_0.20O₃). It was shown that, Mn was successfully doped into BiFeO₃ films and the Fe³⁺ ions in the films increased after doping by the X-ray photoelectron spectroscopy (XPS) analysis. The numerical results in this paper showed that the saturation magnetization of these BiFeO₃ thin films had been found to increase on doping with Mn²⁺ ions, reaching a maximum value of 83.5 emu/cm³ for the BiFe_0.80Mn_0.20O₃ thin films. The numerical results also revealed that the proposed method in this paper can serve as a useful theoretical tool for gaining insight into the correlations of magnetic and structure property for BiFeO₃ thin films.