Strain-induced polarization rotation in epitaxial (001) BiFeO3 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.
Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA.
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Jang
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Baek
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Ortiz
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Folkman
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Das
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Chu
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Shafer
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Zhang
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Choudhury
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Vaithyanathan
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Chen
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Felker
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Biegalski
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Rzchowski
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Schlom
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Ramesh
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