Calculation of the spontaneous polarization for Pb1-xCaxTiO3 close to the tricritical point

Tari O., YURTSEVEN H. H.

FERROELECTRICS, vol.505, no.1, pp.24-33, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 505 Issue: 1
  • Publication Date: 2016
  • Doi Number: 10.1080/00150193.2016.1254001
  • Journal Name: FERROELECTRICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.24-33
  • Middle East Technical University Affiliated: Yes

Abstract

We calculate the spontaneous polarization as a function of temperature for a mixed crystal of Pb1-xCaxTiO3 close to the tricritical pointdx (x = 0.4). This calculation of the spontaneous polarization is performed using the effective field approximation for the dipolar (PbTiO3) and higher order ( quadrupolar and octopolar) interactions for the mixed system of Pb1-xCaxTiO3 at concentrations from x = 0 to x = 0.45.