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Bi1-xHoxFeO3(BHFO, x = 0, 0.05, 0.10, 0.15, 0.20) nanoparticles were successfully synthesized via a simple double solvents based sol-gel route. X-ray diffraction analysis shows the BHFO samples with x = 0-0.10 are pure-phased perovskite structure. Scanning electron microscopy images reveal that the BHFO particles are in nano scale. UV-Vis measurement was taken to determine the band gap of BHFO samples, suggesting the band gap of BHFO samples can be modulated by Ho doping. The absorption spectra of RhB solution show that the BHFO nanoparticles have photocatalytic effect of degrading RhB organic dye which reaches a maximum of 42% for x = 0.10. Well-shaped M–H hysteresis loops of BHFO nanoparticles were observed at 300 K. The magnetism at room temperature is obviously enhanced by Ho doping. For x = 0.10, the BHFO sample performed the strongest ferromagnetism (Ms= 5.3 emu/g, Mr= 1.5 emu/g). The result confirms the contribution of Ho3+towards enhancement of ferromagnetic properties of BiFeO3. [ABSTRACT FROM AUTHOR]

Bi1-xCexFe1-yCoyO3(BCFCO, x = 0, 0.05, 0.1, 0.15; y = 0, 0.05, 0.1, 0.15) particles were synthesized by a sol-gel method to enhance the electrical and magnetic properties of BiFeO3. The structure and morphology properties of Bi1-xCexFe1-yCoyO3particles were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM). XRD patterns show that the BCFCO particles are main single-phase perovskite structure with R3c space group. The enhancement of room-temperature ferromagnetism was obtained in the BCFCO particles. Obvious hysteresis loops of BCFCO were observed, which indicate ferromagnetic order. BCFCO particles exhibit reduction in leakage current density. [ABSTRACT FROM AUTHOR]

BiFeO3(BFO), BiFe0.95Co0.05O3(BFCO), Bi0.9Nd0.1FeO3(BNFO) and Bi0.9Nd0.1Fe0.925Co0.075O3(BNFCO) thin films were prepared on Pt/Ti/SiO2/Si(111) substrates by chemical solution deposition (CSD) method. The structural and electrical properties of the thin films were studied. X-ray diffraction analysis showed that the films were single perovskite structure and a phase transition appeared in BNFO and BNFCO thin films. Electrical measurements indicated that the ferroelectric properties of BFO thin films were significantly improved by Nd and Co codoping. Well saturated hysteresis characteristic with large remanent polarization were observed in BNFCO thin film. The conduction mechanisms were investigated to understand the different conduction behavior in these thin films. [ABSTRACT FROM AUTHOR]

BiFeO3, LO2a-doped BiFeO3, and (La, Co)-codoped BiFeO3 thin films were fabricated on Pt/Ti/SiO2/Si(111) substrates by chemical solution deposition method. The structural and electrical properties of pure, La-doped, and (La, Co)-codoped BiFeO3 thin films were studied. X-ray diffraction analysis showed that all the films were single perovskite structure. Electrical measurements indicated that the ferroelectric properties of BiFeO3 thin films were significantly improved by La and Co codoping. Well saturated hysteresis characteristic with large remanent polarization (larger than 57 μC/cm2) were observed in Bi0.9La0.1Co0.1Fe0.9O3 thin film. [ABSTRACT FROM AUTHOR]