Structural Transition and Multiferroic Properties of Pr- and Mn-Doped BiFeO3 Thin Films

摘要

Bi1-xPrxFe0 95Mn0.05O3 (BPFMO) thin films were successfully deposited on Pt(111)/Ti/SiO2/Si(100) substrates by spin coating with a sol gel technology and rapid thermal annealing. The effects of Pr content on the microstructure, dielectric, ferroelectric, leakage current and magnetic properties of thin films were investigated. The result of X-ray diffraction analysis shows that the BPFMO thin films have rhombohedral-to-tetragonal R3c -> P4 mm phase transition at x = 0.15. The Pr doping on the A-site of BiFeO3 could induce the appearance of the spontaneous magnetization and polarization by the phase transition. The BPFMO thin films with x = 0.2 exhibits the better remanent polarization of 2P(r) = 29 mu C/cm(2), coercive field of 2E(c) = 110 kV/cm and maximum remanent magnetization (2Mr) of 0.025 emu/g.