Structural and optical properties of the Fe-doped BaTiO3 thin films grown on LaAlO3 by polymer-assisted deposition technique
Fe-doped BaTiO3 thin films were grown on (001) oriented LaAlO3 substrates using a polymer-assisted deposition technique. The microstructural and chemical state characters of the films with the Fe doping range from 1 to 10 at% were systematically investigated by X-ray diffraction and X-ray photoelectron spectroscopy. Evolution of the preferred orientation and strain status of BaTiO3 films could be observed with increasing doping amount of Fe. Meanwhile, UV–Vis spectra of doped BaTiO3 thin films showed that the band gap could be strongly affected by the doping amount of Fe with the smallest value at the Fe doping rate of 3 at%, which is proposed to be associated with the inevitable oxygen vacancies and the substitution of Ti ions by the Fe dopants.
KeywordsOxygen Vacancy BaTiO3 BiFeO3 LaAlO3 Doping Amount
This work is supported by the National Basic Research Program of China (973 Program) under Grant No. 2015CB351905, the National Natural Science Foundation of China (Nos. 51372034, 11329402 and 51172036), the Technology Innovative Research Team of Sichuan Province of China (No. 2015TD0005), and “111” project (No. B13042).