The giant electrocaloric effect and high effective cooling power near room temperature for BaTiO3thick film

Yang Bai, Guangping Zheng, Kai Ding, Lijie Qiao, San-Qiang Shi, Dong Guo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

117 Citations (Scopus)

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 Tcand 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.
Original languageEnglish
Article number094103
JournalJournal of Applied Physics
Volume110
Issue number9
DOIs
Publication statusPublished - 1 Nov 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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