Mutiferroic Properties of Polycrystalline Sr-Substituted BiFeO3 Thin Films Prepared by Pulsed Laser Deposition

作者：Park Jung Min^*; Gotoda Fumiya; Nakashima Seiji; Kanashima Takeshi; Okuyama Masanori

来源：Ferroelectrics, 2011, 416: 119-124.

DOI：10.1080/00150193.2011.577720

Sr-substituted BiFeO3 thin films (BSFO) have been prepared on Pt/TiO2/SiO2/Si substrate by pulsed laser deposition using 15% Bi-excess targets (Bi1.15(1-x)SrxFeO3). Some XRD peaks shift to low angle with increasing Sr, and grain sizes decrease. Leakage current densities of BSFO thin films are almost same or a little larger compared to that of BiFeO3 thin film, but P-E hysteresis loops were obtained at RT and 80 K. M-H hysteresis loops of BSFO thin films show weak ferromagnetism at RT and 80 K. BSFO thin film for x = 0.05 shows good multiferroic properties including ferroelectricity and ferromagnetism.

• 出版日期2011