Effects of oxygen vacancies and grain sizes on the dielectric response of BaTiO3

Youn Kyu Choi, Takuya Hoshina, Hiroaki Takeda, Takeshi Teranishi, Takaaki Tsurumi

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34 Citations (Scopus)

Abstract

The effects of grain size and oxygen vacancies on the dielectric responses of BaTiO3 ceramics were investigated using wideband dielectric spectroscopy. Both dipole and ionic polarizations were enhanced by the reduction in grain size down to 2.5 μm. The annealing in low oxygen partial pressure markedly suppressed the dipole polarization possibly due to the domain-wall clamping by oxygen vacancies. To explain the dielectric response of BaTiO 3 ceramics, a complex structure including gradient lattice strain layers (GLSL) were proposed as a model of 90° domain structure.

Original languageEnglish
Article number212907
JournalApplied Physics Letters
Volume97
Issue number21
DOIs
Publication statusPublished - Nov 22 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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