Optical Properties of 0.95BiFeO₃-RTiO₃ (R = Mg, Pb, Ba, Ca and Sr) Thin Films

Abstract

To investigate the effect of RTiO₃ on optical properties of BiFeO₃ thin films, 0.95BiFeO₃-RTiO₃ (R = Mg, Pb, Ba, Ca, and Sr) thin films were grown on amorphous quartz substrates by radio frequency sputtering, where these films with a high phase purity were obtained. A direct band gap of ∼2.718∼2.763 eV is identified for these 0.95BiFeO₃-RTiO₃ thin films, demonstrating different band gap values for these films with RTiO₃ doping. 0.95BiFeO₃-RTiO₃ (Pb and Mg) thin films exhibit better optical properties (transmittance>85% at 550 nm). These results show that 0.95BiFeO₃-RTiO₃ thin films are potential candidate materials for photonic devices.

Keywords:

• Bismuth Ferrite
• Thin Films
• Optical Properties

Acknowledgments

This work was supported by the introduction of the National Natural Science Foundation of China (51102173 and 11002126), the Fundamental Research Funds for the Central Universities (2012SCU04A01), the introduction of talent start funds of Sichuan University (2082204144033), and the Zhejiang Provincial Natural Science Foundation of China (Y6100425).