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Ferroelectrics Volume 575, 2021 - Issue 1
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Research Article

Study of the dielectric response and polarization in PbCo1/3Ta2/3O3 single crystals

A. D. PolushinaDepartment of Physics of Dielectrics and Semiconductors, Ioffe Institute, Saint-Petersburg, RussiaView further author information
,
E. D. ObozovaDepartment of Physics of Dielectrics and Semiconductors, Ioffe Institute, Saint-Petersburg, RussiaCorrespondence[email protected]
View further author information
,
N. S. PetrovaDepartment of Physics of Dielectrics and Semiconductors, Ioffe Institute, Saint-Petersburg, RussiaView further author information
,
V. G. ZalesskiiDepartment of Physics of Dielectrics and Semiconductors, Ioffe Institute, Saint-Petersburg, RussiaView further author information
&
S. G. LushnikovDepartment of Physics of Dielectrics and Semiconductors, Ioffe Institute, Saint-Petersburg, RussiaView further author information
Pages 167-172 | Received 17 Aug 2020, Accepted 30 Dec 2020, Published online: 26 May 2021
 
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Abstract

Results of studies of dielectric response and polarization in PbCo1/3Ta2/3O3 (PCT) single crystals grown by spontaneous crystallization are presented. Anomalies in the temperature dependence of the complex dielectric permittivity at 350, 270, 183, and 105 K have been observed. Using the thermally stimulated depolarization method, the temperature region of remnant polarization existence has been revealed below 270 K. It is assumed that in PCT, as well as in PbCo1/3Nb2/3O3 (PCN), in low-temperature region the phase separation caused by continuous switching of charge (valence) of Co2+/Co3+ and Ta4+/Ta5+ ions is realized.

Additional information

Funding

We are grateful T. A. Smirnova for discussions and for growth of the single crystals. This work was supported by the Russian Foundation for Basic Research (grant nos. 18-502-51050 and 18-02-01084).

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