Landau-Devonshire Parameters for the Tunable Paraelectric Material BaTi.9(Sc,Ta).05O3

Abstract

Measured values of the nonlinear electrical response of the perovskite ferroelectric compound BaTi.9(Sc,Ta).05O3 are used to deduce the thermodynamic Landau-Devonshire parameters of the material, which are found to differ strongly from those of the parent material BaTiO3, despite the small amount of added Sc and Ta. The compound is found to cubic, with a low transition temperature of 60 deg. C. An explanation for this behavior is advanced based on quenching of electrostriction.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2008
Accession Number
ADA479116

Entities

People

  • Frank Crowne
  • Virginia Miller

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Capacitance
  • Chemistry
  • Crystal Structure
  • Curie Temperature
  • Dielectric Permittivity
  • Electric Fields
  • Electrical Properties
  • Electrostriction
  • Energy
  • Experimental Data
  • Free Energy
  • Materials
  • Perovskites
  • Phase
  • Phase Transformations
  • Transition Temperature
  • Transitions

Fields of Study

  • Materials science
  • Physics

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.