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Fizika Tverdogo Tela, 2019 Volume 61, Issue 6, Pages 1128–1137 (Mi ftt8791)

This article is cited in 8 papers

Ferroelectricity

Study of the physical properties and electrocaloric effect in the BaTiO$_{3}$ nano- and microceramics

A. V. Kartashevab, V. S. Bondarevac, I. N. Flerovca, M. V. Gorevac, E. I. Pogoreltsevac, A. V. Shabanova, M. S. Molokeevac, S. Guillemet-Fritschd, I. P. Raevskiie

a L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk
b Krasnoyarsk State Pedagogical University named after V. P. Astaf'ev
c Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk
d CIRIMAT, Université de Toulouse Toulouse, France
e Research Institute of Physics, Southern Federal University, Rostov-on-Don

Abstract: The specific heat, thermal expansion, permittivity, and electrocaloric effect in bulk of BaTiO$_{3}$ (BT) samples in the form of nano- (nBT-500 nm) and micro- (mBT-1200 nm) ceramics fabricated using spark plasma sintering and solid-state plasma techniques have been investigated. The size effect has been reflected, to a great extent, in the suppression of the specific heat and thermal expansion anomalies and in the changes in the temperatures and entropies of phase transitions and permittivity, and a decrease in the maximum intensive electrocaloric effect: $\Delta T^{\operatorname{max}}_{\operatorname{AD}}$ = 29 mK ($E$ = 2.0 kV/cm) for nBT and $\Delta T^{\operatorname{max}}_{\operatorname{AD}}$ = 70 mK ($E$ = 2.5 kV/cm) for mBT. The conductivity growth at temperatures above 360 K leads to the significant irreversible heating of the samples due to the Joule heat release in the applied electric field, which dominates over the electrocaloric effect.

Received: 08.12.2018
Revised: 08.12.2018
Accepted: 15.01.2019

DOI: 10.21883/FTT.2019.06.47689.309


 English version:
Physics of the Solid State, 2019, 61:6, 1052–1061

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