Ma, Yang-Bin ; Novak, Nikola ; Koruza, Jurij ; Yang, Tongqing ; Albe, Karsten ; Xu, Bai-Xiang (2016)
Enhanced electrocaloric cooling in ferroelectric single crystals by electric field reversal.
In: Physical Review B, 94 (10)
doi: 10.1103/PhysRevB.94.100104
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
An improved thermodynamic cycle is validated in ferroelectric single crystals, where the cooling effect of an electrocaloric refrigerant is enhanced by applying a reversed electric field. In contrast to the conventional adiabatic heating or cooling by on-off cycles of the external electric field, applying a reversed field is significantly improving the cooling efficiency, since the variation in configurational entropy is increased. By comparing results from computer simulations using Monte Carlo algorithms and experiments using direct electrocaloric measurements, we show that the electrocaloric cooling efficiency can be enhanced by more than 20% in standard ferroelectrics and also relaxor ferroelectrics, like Pb(Mg1/3/Nb2/3)0.71Ti0.29O3.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Ma, Yang-Bin ; Novak, Nikola ; Koruza, Jurij ; Yang, Tongqing ; Albe, Karsten ; Xu, Bai-Xiang |
| Art des Eintrags: | Bibliographie |
| Titel: | Enhanced electrocaloric cooling in ferroelectric single crystals by electric field reversal |
| Sprache: | Englisch |
| Publikationsjahr: | 29 September 2016 |
| Verlag: | APS Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 94 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1103/PhysRevB.94.100104 |
| Kurzbeschreibung (Abstract): | An improved thermodynamic cycle is validated in ferroelectric single crystals, where the cooling effect of an electrocaloric refrigerant is enhanced by applying a reversed electric field. In contrast to the conventional adiabatic heating or cooling by on-off cycles of the external electric field, applying a reversed field is significantly improving the cooling efficiency, since the variation in configurational entropy is increased. By comparing results from computer simulations using Monte Carlo algorithms and experiments using direct electrocaloric measurements, we show that the electrocaloric cooling efficiency can be enhanced by more than 20% in standard ferroelectrics and also relaxor ferroelectrics, like Pb(Mg1/3/Nb2/3)0.71Ti0.29O3. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Mechanik Funktionaler Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 30 Sep 2016 11:06 |
| Letzte Änderung: | 26 Jan 2024 09:21 |
| PPN: | |
| Sponsoren: | The fundings of Deutsche Forschungsgemeinschaft (DFG) SPP1599 (XU 121/1, AL 578/16, NO 1221/2), National Natural Science Foundation of China (No. 51272178), and the Innovation Program of Shanghai Municipal Education Commission (No. 14ZZ041) are gratefully, acknowledged. Competence Center of HPC Hessen is appreciated for computation time. |
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