Effect of oxygen partial pressure on structure and dielectric property of BaTi2O5 films prepared by laser ablation

Chuanbin Wang, Rong Tu, Takashi Goto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

BaTi2O5 ferroelectric films were prepared on MgO (100) substrates by laser ablation at various oxygen partial pressures (P O2). The effect of PO2 on the orientation, composition, surface morphology and dielectric property of the films was investigated. The molar ratio of Ti to Ba was independent of PO2, almost in agreement with the stoichiometric composition of BaTi2O5. The BaTi2O5 films showed the orientation of (710) and (020) depending on PO2. At PO2 = 12.5 Pa, (020) oriented BaTi2O5 film with an elongated granular and perpendicularly crossing texture was eoitaxiallv grown on MgO (100) substrates. The BaTi2O5 film prepared at PO2 = 12.5 Pa exhibited a sharp permittivity maximum ε′ ≈ 2000) at 750 K.

Original languageEnglish
Pages (from-to)625-628
Number of pages4
JournalMaterials Transactions
Volume48
Issue number3
DOIs
Publication statusPublished - 2007 Mar 1

Keywords

  • BaTiO films
  • Laser ablation
  • Permittivity
  • Structure

ASJC Scopus subject areas

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

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