Study of the effect of Mn doping on the BiFeO₃system

Abstract

In this work a Mn doped magnetoelectric BiFeO3 system is studied. X-ray diffraction (XRD), scanning electron microscopy, energy dispersive x-ray analysis (EDX), Mössbauer spectroscopy at room and high temperatures, differential scanning calorimetry (DSC), high temperature magnetization, dielectric constant measurements and x-ray photoelectron spectroscopy (XPS) are used to characterize the samples. The XRD result shows BiFeO3 as a major phase along with about 1–2% impurity phase. EDX shows the equi-atomic ratio of Bi and Fe site cations. Using DSC it is observed that the Néel temperature decreases with Mn doping. Using Mössbauer and XPS it is observed that Fe exists in the +3 oxidation state. The samples have an antiferromagnetic nature with Mn doping.