CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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On the parameters for electrocaloric effect predicted by indirect method |
Hong-Bo Liu(刘宏波) |
School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China |
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Abstract The influences of specific heat capacity CP, temperature step △T, electric field step △ E, and initial electric field E1 on predicted electrocaloric (EC) temperature △ T of monodomain BaTiO3 are examined by combining the Maxwell equation and phenomenological theory. Since the procedure is similar to indirect measurement of the EC effect, the results can serve as a reference for experiments. The results suggest that (i) it is reasonable to use zero-field CP, (ii) optimized △ T should be 2 K, (iii) it is better to keep △ E<EC, and (iv) E1<EC. Here, EC is the coercive field of material.
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Received: 29 June 2017
Revised: 05 August 2017
Accepted manuscript online:
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PACS:
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77.70.+a
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(Pyroelectric and electrocaloric effects)
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Fund: Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 17ZR1447200). |
Corresponding Authors:
Hong-Bo Liu
E-mail: bohongliu@gmail.com
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Cite this article:
Hong-Bo Liu(刘宏波) On the parameters for electrocaloric effect predicted by indirect method 2017 Chin. Phys. B 26 117701
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