Structural and Physical Properies of Y- doped BiFeO3 Material Prepared by Sol-gel Method

Abstract

Abstract: Y - doped BiFeO₃ materials were prepared by a sol – gel method. X-ray diffraction (XRD) meansurement has been carried out to characterize crystal structure and to detect the impurities existing in these materials. The results showed that both lattice constants a and c of the unit cell of BiFeO₃ substance become smaller as the Y³⁺ content is increased. The effect of introducing Y³⁺ was to decrease the optical band gap for doped samples Bi_1−xY_xFeO₃ (x = 0.00  0.20). Magnetic properties of Y-doped BiFeO₃ were investigated by vibrating sample magnetometer (VSM) measurements at room temperature, using maximum magnetic field of about 10 kOe. These materials exhibited a weak ferromagnetic behavior and magnetization of the  sample was improved as presence of  Y³⁺ ions. When x = 0.15, 0.20, structural and magnetic properties change sharply. Y doping BiFeO₃ material modifies its physical properties.