Lead titanate (PbTiO3) thin film is a promising material for ultrahigh-density ferroelectric data storage systems, pyroelectric sensors and ferroelectric optical devices. In this study, high-quality epitaxial PbTiO 3 thin films were deposited on SrTiO3(100) and SrRuO 3/SrTiO3(100) by a hydrothermal method. The crystal orientation of the deposited film was investigated with a high-resolution X-ray diffraction mapping system. The full width at half maximum (FWHM) of the rocking curve of the (002) PbTiO3 film on SrTiO3 was 0.060°. The reciprocal space mappings of (103) verified that the PbTiO 3 films had perfect c-axis orientation. The self-aligned polarizaton was confirmed with observation using a scanning nonlinear dielectric microscope. The PbTiO3 on SrRuCO3/SrTiO3(100) was used for the D-E hysteresis curve measurement and the remanent polarization was 96.5μC/cm2. Domain patterning was applied to a 50-nm-thick PbTiO3 film using a conductive cantilever probe. The minimum radius of the nano domain dot was 12nm, corresponding to a data density of 1 Tbit/inch2.
|ジャーナル||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|出版ステータス||Published - 2004 9 1|
ASJC Scopus subject areas
- Physics and Astronomy(all)