Abstract
Piezoresponse atomic-force microscopy (PFM) has been used to characterize the local piezoelectric properties of a novel, nanotube-patterned (“honeycomb”) thin film of BaTiO3 on Ti substrate synthesized hydrothermally at 200 °C. PFM amplitude and phase images, prior to the application of any direct current (dc) field, show ring-shaped piezoelectric regions that correspond to the nanostructure of this film. These results show clearly that the as-synthesized nanotube-patterned BaTiO3 thin film is piezoelectric, with a net spontaneous polarization perpendicular to the film-substrate interface. In addition, polarization switching and hysteresis were observed as a function of applied dc field, confirming that this novel fabrication procedure results in unique configurations of BaTiO3 film that are also ferroelectric.
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Poyato, R., Huey, B.D. & Padture, N.P. Local piezoelectric and ferroelectric responses in nanotube-patterned thin films of BaTiO3 synthesized hydrothermally at 200 °C. Journal of Materials Research 21, 547–551 (2006). https://doi.org/10.1557/jmr.2006.0069
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DOI: https://doi.org/10.1557/jmr.2006.0069