Structure and phase composition of BiFeO3 : La films synthesized by chemical deposition from solutions

• Published in: Physics of the solid state 2012-05, Vol.54 (5), p.997-998
• Main Authors: Zhigalina, O. M., Khmelenin, D. N., Vorotilov, K. A., Kotova, N. M., Mazitov, A. A., Seregin, I. S., D’yakonova, N. B.
• Format: Article
• Language: English
• Subjects: Physics; Physics and Astronomy; Proceedings of the XIX All-Russian Conference on Physics of Ferroelectrics (VKS-XIX); Solid State Physics
• ISSN: 1063-7834; 1090-6460
• DOI: 10.1134/S1063783412050514

The transmission electron microscopy, energy-dispersive, and X-ray powder diffraction analyses have been used to study the changes in the structure and phase composition of lanthanum-doped BiFeO 3 and undoped BiFeO 3 thin films synthesized by chemical deposition from solutions and annealed in the temperature range 500–700°C. It has been found that the temperature of the onset of crystallization with formation of the rhombohedral phase of BiFeO 3 is 500°C. As the annealing temperature increases, the phase composition of the film is changed: the Bi 3.43 Fe 0.57 O 6 and Bi 2 Fe 4 O 9 phases are formed. The lanthanum doping increases the crystallization temperature to 550°C; in this case, the film remains single-phase to T = 700°C.