A hydrothermally deposited epitaxial PbTiO3 thin film on SrRuO3 bottom electrode for the ferroelectric ultra-high density storage medium

Takeshi Morita, Yasuo Cho

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A lead titanate epitaxial thin film is one of the important ferroelectric films and lattice matching with strontium titanate is preferable. However, it was thought to be difficult to obtain high insulation property and very few superior hysteresis curves were measured with lead titanate. The hydrothermal method can avoid a lead vacancy and residual strain at the boundary of the substrate due to low reaction temperature of 150°C. Using strontium ruthenium oxide bottom electrode on strontium titanate, the lead titanate thin film was successfully deposited by the hydrothermal method. The single crystal-like DE hysteresis curve showed a remanent polarization of 96.5 μC/cm2. The domain direction was controlled by an applied electric field using a metal coated AFM cantilever probe and the domain pattern was observed by scanning nonlinear dielectric microscopy (SNDM). Minimum dot radius of inverted domain was 12 nm corresponding to data storage density of 1 Tbit/inch2.

Original languageEnglish
Pages (from-to)247-257
Number of pages11
JournalIntegrated Ferroelectrics
Publication statusPublished - 2004


  • Epitaxial thin film
  • Ferroelectricity
  • Hydrothermal method
  • Lead titanate
  • Scanning nonlinear dielectric microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Ceramics and Composites
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry


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