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http://hdl.handle.net/10397/5300
| Title: | The giant electrocaloric effect and high effective cooling power near room temperature for BaTiO₃ thick film | Authors: | Bai, Y Zheng, G Ding, K Qiao, L Shi, SQ Guo, D |
Issue Date: | 1-Nov-2011 | 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. | Keywords: | Barium compounds Cooling High-temperature effects Multilayers Pyroelectricity Thin films |
Publisher: | American Institute of Physics | Journal: | Journal of applied physics | ISSN: | 0021-8979 | EISSN: | 1089-7550 | DOI: | 10.1063/1.3658251] | 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 http://link.aip.org/link/?jap/110/094103. |
| Appears in Collections: | Journal/Magazine Article |
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|---|---|---|---|---|
| Bai_Giant Electrocaloric_Cooling.pdf | 609.46 kB | Adobe PDF | View/Open |
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