Spontaneous Strain as Order Parameter to Describe the Phase Transition in La3+ Doped Pbtio3 Ferroelectric Perovskite

  • Y. Méndez-González Departamento de Física Aplicada, Instituto de Cibernética, Matemática y Física
  • A. Pentón-Madrigal Facultad de Física-Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana
  • A. Peláiz-Barranco Facultad de Física-Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana
  • F. Calderón-Piñar Facultad de Física-Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana

Abstract

Spontaneous strains of lanthanum doped PbTiO3 compound were determined from the temperature dependence of the unit cell parameters. The critical temperature was determined by using the spontaneous strain as order parameter. The calculated value of the critical temperature agrees with that obtained through differential scanning calorimetric measurements. The temperature dependence of the spontaneous polarization was also estimated through the components of the uniform elastic deformations parallel and perpendicular to the [001] crystallographic direction of the perovskite structure.

Published
Dec 14, 2012
How to Cite
MÉNDEZ-GONZÁLEZ, Y. et al. Spontaneous Strain as Order Parameter to Describe the Phase Transition in La3+ Doped Pbtio3 Ferroelectric Perovskite. Revista Cubana de Física, [S.l.], v. 29, n. 2, p. 70-73, dec. 2012. ISSN 2224-7939. Available at: <http://revistacubanadefisica.org/index.php/rcf/article/view/RCF_29-2_70_2012>. Date accessed: 20 sep. 2020.
Section
Original Articles

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