Abstract
We observed the retention loss phenomena of the nanodomains with an average diameter of 36nm and that of the square domains with a size of 1 and 25μm2 that were reversed by an applying electric field at an atomic force microscopy conductive tip in a heteroepitaxial PbTiO3 thin film, which was fabricated via hydrothermal epitaxy below Curie temperature, TC. While the nanodomains did not undergo significant retention loss until 5.3×106s, the square domains revealed some retention loss for a fixed period after long latent periods. The observed phenomena were explained in terms of the instability of the curved c∕c domain wall and the compressive strain energy. Analyses showed that the nanodomains composed a cylinder extending to the bottom electrode; however, the square domains had a curved c∕c domain wall, including the compressive strain energy, and these factors caused the retention loss.
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