Properties Of Multiferroic BiFeO3 Research Articles

Beneficial modification of the properties of multiferroic BiFeO 3 by cation substitution

The effects of modifying the well-known multiferroic BiFeO 3 by substituting Fe by Mn and Bi by La have been investigated. It is shown that both the substitutions have a favourable effect on the multiferroic properties of BiFeO 3. Thus, both BiFe 1− x Mn x O 3 and Bi 1− x La x FeO 3 ( x = 0.0–0.3) show increased magnetization accompanied by hysteresis loops as well as improved dielectric properties. The ferroelectric transition temperature is lower than that of BiFeO 3, but is in a more accessible range. In Bi 1− x La x FeO 3, there is a change in structure at x = 0.2.

Influence of La doping in multiferroic properties of BiFeO3 thin films

The influence of La doping on the crystal structure and multiferroic properties of BiFeO3 (BFO) thin films was investigated. BFO-based films of pure perovskite phase were deposited on BaPbO3∕Pt∕TiOx∕SiO2∕Si substrates by rf-magnetron sputtering. The increased dielectric constant and remanent polarization of the La-doped BFO films were due to the increased lattice parameters and an improved crystallinity. The polarization switching and the fatigue behavior of the BFO films were significantly enhanced by the La doping. The in-plane magnetization-field curves revealed that the room-temperature saturated magnetization of the BFO films increased with La doping.