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Published in:
01-01-2014
Pulsed laser deposition of BiFeO3 thin films with large polarization on Pt(111)/Ti/SiO2/Si by controlling substrate temperature
Published in: Journal of Materials Science: Materials in Electronics | Issue 1/2014
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Abstract
Bismuth ferrite (BiFeO3) thin films with large polarization were grown on Pt(111)/Ti/SiO2/Si by optimizing the substrate temperatures (T
sub). The BiFeO3 thin films were prepared by pulsed laser deposition and the effects of T
sub (T
sub = 853–913 K) on crystallization orientation, surface morphology and properties of the films were investigated. The microstructure and morphology of the films showed a strong dependence on T
sub. The film prepared at T
sub = 893 K had a relatively high degree of (111) preferential orientation and densely packed morphology. A large polarization with the maximum remanent polarization of 108 μC/cm2 was obtained, which was due to the high degree of preferential orientation and the dense surface morphology at the optimum substrate temperature.