Perfectly c-axis oriented epitaxial lead titanate thin film deposited by a hydrothermal method for a data storage medium

Takeshi Morita, Yasuo Cho

Research output: Contribution to journalConference article

Abstract

A hydrothermal method is a unique method to deposit ferroelectric thin films utilizing chemical reaction in solutions. In addition to the low reaction temperature below 200°C, its simple process procedure, automatically aligned polarization and a three-dimensional deposition are advantages. In this study, a lead titanate epitaxial thin film was obtained on a strontium ruthenate bottom electrode sputterd on strontium titanate (100). The high-resolution X-ray diffraction mapping showed the film was perfectly c-axis oriented. The transmission electron microscope observation revealed that the film had no lattice dislocation at the interface between lead titanate and strontium ruthenate. A remanent polarization of 96.5μC/cm2 was measured with the single crystal-like DE hysteresis curve. The observation of a scanning nonlinear dielectric microscopy indicated that this film did not contain any defect such as an a-domain and a grain boundary even on the nano scale. With various pulse parameters, nano-domain dots were patterned and the minimum dot radius of inverted domain was 12 nm corresponding to data storage density of 1Tbit/inch2.

Original languageEnglish
Article numberD3.4
Pages (from-to)147-152
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume830
Publication statusPublished - 2005 Jun 20
EventMaterials and Processes for Nonvolatile Memories - Boston, MA, United States
Duration: 2004 Nov 302004 Dec 2

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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