Comparative study on doping effects in Bi1−xDyxFe1−yMnyO3 nanoparticles fabricated by sol-gel technique. Issue 14 (1st October 2017) - Zhu, Yiyi
Abstract: We have studied the optical, electrical and magnetic properties of Dy and Mn doped BiFeO3 nanoparticle synthesized by the sol-gel technique. In the doped samples, a transition of crystal structure was demonstrated by XRD. With increasing x from 0.00 to 0.10 and y from 0.00 to 0.05, the optical band gap of Bi1−x Dyx Fe1−y Mny O3 nanoparticles decreases and can be interpreted by the decreased particle size and the increased internal stress of samples, which caused by Dy, Mn doping. According to the data from X-ray photoelectron spectroscopy, the doping of Dy 3+ and Mn 2+ can availably restrain the transform from Fe 3+ to Fe 2+ . A small leakage current density and large value of saturation magnetization are observed for the co-doped samples. Therefore, the doping of (Dy, Mn) is an effective mean to strengthen the multiferroic behavior of the nanoparticles.