Open AccessОсобенности динамики температурного отклика сегнетоэлектрической керамики при исследовании электрокалорического эффекта
Author(s) -
Г.Ю. Сотникова,
Г.А. Гаврилов,
A.А. Капралов,
Р.С. Пассет,
Е.П. Смирнова
Publication year - 2021
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2021.24.51795.18982
Subject(s) - electrocaloric effect , filamentation , electric field , materials science , protein filament , electrical resistivity and conductivity , conductivity , condensed matter physics , composite material , ferroelectricity , optics , physics , optoelectronics , electrical engineering , engineering , laser , quantum mechanics , dielectric
Temperature response of a material to an external electric field is the main method for electrocaloric effect study in ferroelectrics. In this work, for 0.65 PbFe2/3W1/3O3 – 0.35 PbTiO3 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.