Impedance spectroscopy of Ba 4Ti 13O 30 film prepared by laser chemical vapor deposition

Dongyun Guo, Takashi Goto, Chuanbin Wang, Qiang Shen, Lianmeng Zhang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The impedance and electrical conductivity of Ba 4Ti 13O 30 film prepared by laser chemical vapor deposition were investigated as functions of temperature (300-1073 K) and frequency (10 2-10 7 Hz). The impedance response was resolved into two contributions, which were associated with the grains (R gC g) and grain boundaries (R gbC gb).With increasing temperature, both R and C decreased. R gb was much higher than R g and C g were close to C gb. Below 876 K, a step-like behavior was observed in the ac conductivity plots as functions of frequency due to two dispersion regions. The low-frequency dispersion was associated with grain boundaries and the high-frequency one corresponded to grains. The activation energies of grain conduction (E g) and grain boundary conduction (E gb) were 0.20 and 1.49 eV, respectively, which indicated that the relaxation process in grains arose from hopping electron and that in grain boundaries from the diffusion of oxygen vacancies.

Original languageEnglish
Pages (from-to)197-201
Number of pages5
JournalJournal of Electroceramics
Volume28
Issue number2-3
DOIs
Publication statusPublished - 2012 May 1

Keywords

  • Ba Ti O film
  • Electrical conductivity
  • Impedance
  • Laserchemicalvapordeposition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

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