The giant electrocaloric effect and high effective cooling power near room temperature for BaTiO3 thick film
- 1 November 2011
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 110 (9), 094103
- https://doi.org/10.1063/1.3658251
Abstract
The electrocaloric effect (ECE) of BaTiO3multilayer thick film was investigated by direct calorimetric measurement. The ECE increases monotonically with the enhancement of applied field. The maximum ECE occurs above T 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.Keywords
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