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Home » Technical Physics Letters » Year 2022, issue 15 » Article p. 68
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Temperature response features of ferroelectric ceramics in electrocaloric effect study
Russian version
DOI: 10.21883/TPL.2022.15.55284.18982
Sotnikova G. Yu. 1, Gavrilov G. A. 1, Kapralov A.A.1, Passet R. S.1, Smirnova E. P. 1
1Ioffe Institute, St. Petersburg, Russia
Email: g.sotnikova@mail.ioffe.ru, gga_dom@mail.ru, kapr_alex@inbox.ru, rostislav.passet@mail.ru, esmirnoffa@gmail.com
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Temperature response of a material to an external electric field is the main method for electrocaloric effect study in ferroelectrics. In this work, for 0.65PbFe2/3W1/3O3-0.35PbTiO3 solid solution as a model object, it is shown that with an increase in the electric field strength, current filamentation effect can occur. It leads to formation of local regions of increased conductivity in the sample. The associated thermal effect have short characteristic times, due to the small volume of the filament. They are comparable to the times of the electrocaloric response of the material, and can lead to significant errors in the detection of the electrocaloric effect. Keywords: electrocaloric effect, temperature response, ferroelectric ceramics, current filamentation effect.
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