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Title: The giant electrocaloric effect and high effective cooling power near room temperature for BaTiO₃ thick film
Authors: Bai, Yang
Zheng, Guangping
Ding, Kai
Qiao, Lijie
Shi, San-qiang
Guo, Dong
Subjects: Barium compounds
High-temperature effects
Thin films
Issue Date: 1-Nov-2011
Publisher: American Institute of Physics
Source: Journal of applied physics, 1 Nov. 2011, v. 110, no. 9, 094103, p. 1-3.
Abstract: The electrocaloric effect (ECE) of BaTiO₃ multilayer thick film was investigated by direct calorimetric measurement. The ECE increases monotonically with the enhancement of applied field. The maximum ECE occurs above T[sub c] and shifts to higher temperature with increasing applied field. Under an ultrahigh field of 800 kV/cm, it exhibits a giant ECE of ΔT = 7.1 K and ΔS = 10.1 J/kg · K at 80 °C. The ECE heat follows a general power-law relation with the varying rate of applied field within a certain range. A high cooling power (∼50 W/kg) is achieved based on the net-cooling resulting from the different varying rates of rising and falling fields.
Rights: © 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Yang Bai et al., J. Appl. Phys. 110, 094103 (2011) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.3658251]
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:ME Journal/Magazine Articles

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