Publication Type:Journal Article
Source:Physical Review Letters, Volume 101, Number 10 (2008)
Keywords:Epitaxial films, Induced polarization, Polarization, rotation, Spontaneous polarizations, Thermoanalysis, Thick films, thin films
Direct measurement of the remanent polarization of high quality (001)-oriented epitaxial BiFeO3 thin films shows a strong strain dependence, even larger than conventional (001)-oriented PbTiO3 films. Thermodynamic analysis reveals that a strain-induced polarization rotation mechanism is responsible for the large change in the out-of-plane polarization of (001) BiFeO3 with biaxial strain while the spontaneous polarization itself remains almost constant. © 2008 The American Physical Society.
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