Temperature-activation mechanism of the temperature dependence of the dielectric constant of ferroelectric ceramics PZT

The theoretical possibility of the temperature-activation process of the temperature dependence of the dielectric constant of samples of ferroelectric ceramics lead zirconate titanate (PZT) at temperatures below the Curie point is considered. The model takes into account the 180° motion of the domai...

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Bibliographic Details
Published in:Journal of advanced dielectrics 2022-06, Vol.12 (3)
Main Author: Kuzenko, D. V.
Format: Article
Language:English
Subjects:
activation energy
Ceramics
Curie temperature
dielectric constant
Domain walls
Ferroelectric materials
Ferroelectricity
Lead zirconate titanates
Oxygen
oxygen vacancies
Permittivity
PZT
Temperature dependence
Vacancies
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Summary:The theoretical possibility of the temperature-activation process of the temperature dependence of the dielectric constant of samples of ferroelectric ceramics lead zirconate titanate (PZT) at temperatures below the Curie point is considered. The model takes into account the 180° motion of the domain wall, which is located in the potential well. The values of activation energies ( ∼ 0.01, 0.1, 1 eV) were obtained from the experimental dependences of the logarithm of the dielectric constant on the reciprocal temperature. This is associated with three processes: initial vibrations of domain walls; separation of domain walls (DWs) from oxygen vacancies; the motion of DWs as a result of the motion of oxygen vacancies.
ISSN:2010-135X
2010-1368
DOI:10.1142/S2010135X22500102