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Strain-induced polarization rotation in epitaxial (001) BiFeO3 thin films |
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| Authors: | Jang H W Baek S H Ortiz D Folkman C M Das R R Chu Y H Shafer P Zhang J X Choudhury S Vaithyanathan V Chen Y B Felker D A Biegalski M D Rzchowski M S Pan X Q Schlom D G Chen L Q Ramesh R Eom C B |
| Affiliation: | Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA. |
| Abstract: | 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. |
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