Phenomenological analysis for intrinsic properties of nonstoichiometric BaTiO3

Soonil Lee, George A. Rossetti, Zi-kui Liu, Clive A. Randall

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The defect and phase equilibria of nonstoichiometric BaTiO3 have been systematically investigated. Self-consistent data were obtained and successfully modeled analytically with defect reactions taking into account the dependent variables of Ba/Ti ratio, temperature, and oxygen partial pressure (Po2). The compositional dependence of the ferroelectric properties in the solid solution regime was described by the Landau-Devonshire theory allowing the parameters of the theory to be functions of stoichiometry. With this approach, we are able to self-consistently determine the spontaneous polarization, dielectric constant, and energetics of the paraelectric- ferroelectric phase transition of powder samples. This theoretical approach provided a way of predicting the intrinsic properties of nonstoichiometric BaTiO3, which have had no previous complete determination or consideration.

Original languageEnglish (US)
Title of host publication17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
Volume3
DOIs
StatePublished - Dec 1 2008
Event17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008 - Santa Fe, NM, United States
Duration: Feb 23 2008Feb 28 2008

Other

Other17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
CountryUnited States
CitySanta Fe, NM
Period2/23/082/28/08

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Lee, S., Rossetti, G. A., Liu, Z., & Randall, C. A. (2008). Phenomenological analysis for intrinsic properties of nonstoichiometric BaTiO3 In 17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008 (Vol. 3). [4693763] https://doi.org/10.1109/ISAF.2008.4693763