The structural and multiferroic properties of Bi(1−x)Ce x Fe(1−x)(Mg0.5Ti0.5) x O3 thin films

摘要: Bi(1−x)Ce x Fe(1−x)(Mg0.5Ti0.5) O3 (x = 0, 0.05, 0.10, 0.20, 0.25) thin films were synthesized by a sol–gel method. The structural, electrical and magnetic properties of have been investigated. BiFeO3 film possessed perovskite-type rhombohedral structure with space group R3c, the average grain size decreased as concentration Ce, Mg Ti co-doping increased. leakage current densities ions exhibited significant reduction compared that film. Compared density (4.19 × 10−4 A/cm2), Bi0.80Ce0.20Fe0.80Mg0.10Ti0.10O3 was reduced about four orders magnitude (1.05 × 10−8 A/cm2) under electric field 300 kV/cm. Well-defined ferroelectric loops obtained polarization increased increase co-doping. remanent (2P r  ~34.9 μC/cm2) approximately times larger than pure  ~7.8 μC/cm2) applied magnetization 10 kOe increasing improvement behaviors for observed significantly, cooperating enhanced ferroelectricity which indicated will be promising materials in application to magnetoelectric devices.