Influence of Zn doping on structural, optical and magnetic properties of BiFeO_3 films fabricated by the sol-gel technique

摘要

The multiferroic BiFe_(1-x)Zn_xO_3 (BFZO_x, x=0, 0.03, 0.06, and 0.09) films have been prepared on quartz substrates by the sol-gel technique. X-ray diffraction indicates that BFZO_x films characterize the distorted rhombohedral perovskite structure. Scanning electron microscopy (SEM) shows that Zn doping can improve the crystallinity of BFZO_x (x=0.06 and 0.09) films. With increasing Zn composition, the fundamental absorption edges of BFZO_x films show blue shift. Compared with BiFeO_3 film, the saturation magnetization (M_s) of BFZO_x (x=0.03, 0.06, and 0.09) films is significantly enhanced, which provides potential applications in information storage.