Epitaxial PbTiO3 thin films on SrTiO3(100) and SrRuO3/SrTiO3(100) substrates deposited by a hydrothermal method

Takeshi Morita, Yasuo Cho

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)6535-6538
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number9 B
DOIs
Publication statusPublished - 2004 Sep 1

Keywords

  • Epitaxial thin film
  • Hydrothermal method
  • Lead titanate
  • Scanning nonlinear dielectric microscope
  • Ultra-high density ferroelectric data storage

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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