Reference : Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/21288
Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals
English
Liu, Yang [CNRS, UMR 8580, Ecole centrale de Paris, France > Laboratoire Structures, Propriétés et Modélisation des Solides > > ; Xi'an Jiaotong University, Xi'an, People's Republic of China > Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials]
Wei, Jie [CNRS, UMR 8580, Ecole centrale de Paris, France > Laboratoire Structures, Propriétés et Modélisation des Solides > > ; Xi'an Jiaotong University, Xi'an, People's Republic of China > Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education]
Janolin, Pierre-Eymeric [CNRS, UMR 8580, Ecole centrale de Paris, France > Laboratoire Structures, Propriétés et Modélisation des Solides]
Infante, Ingrid C. [CNRS, UMR 8580, Ecole centrale de Paris, France > Laboratoire Structures, Propriétés et Modélisation des Solides]
Kreisel, Jens mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit > ; CRP Gabriel Lippmann, Belvaux, Luxembourg > Département Science et Analyse des Matériaux]
Lou, Xiaojie [Xi'an Jiaotong University, Xi'an, People's Republic of China > Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials]
Dkhil, Brahim [CNRS, UMR 8580, Ecole centrale de Paris, France > Laboratoire Structures, Propriétés et Modélisation des Solides]
2014
Physical Review B
90
10
Yes (verified by ORBilu)
International
1098-0121
[en] An applied stress field σ3 can reversibly change the temperature of an elastocaloric material under adiabatic
conditions, and the temperature change Tσ3 is usually maximized near phase transitions.Using a thermodynamic
approach, we demonstrate that an elastocaloric strength α = | Tσ3
|/|σ3| of 0.016 K/MPa can be achieved
benefiting from the full first-order phase transition in BaTiO3 single crystals, which is comparable with typical
elastocaloric materials reported in the literature. The elastocaloric temperature change is found to be giant
(3.2 K) under a stress of 200 MPa with a temperature span of over 50 K, which can be significantly larger than
its electrocaloric counterpart (∼1 K). Moreover, it is found that the elastocaloric strength can be remarkably
enhanced (2.32 K/MPa) as long as the phase transition is triggered even by a modest stress near the sharp
first-order phase transition, which is two orders of magnitude larger than those accomplished by full transition.
Therefore, even a low stress (<30 MPa) can induce a modest elastocaloric effect (1.3 K) comparable with the
electrocaloric counterpart, which is accompanied by a reduction of the working temperature span. In addition, it
is found that the electrocaloric peak under tensile stresses moves towards higher temperatures with its magnitude
slightly enhanced. Hopefully, our study will stimulate further investigations on elastocaloric and stress-mediated
electrocaloric effects in ferroelectrics.
http://hdl.handle.net/10993/21288
10.1103/PhysRevB.90.104107
Times Cited: 1 Infante, Ingrid/D-4450-2014; Janolin, Pierre-Eymeric/B-3271-2008; Dkhil, Brahim/O-8939-2014; Lou, Xiaojie/B-6551-2009; wei, jie/G-2864-2011 Infante, Ingrid/0000-0003-3929-6614; Janolin, Pierre-Eymeric/0000-0003-3385-5374; Dkhil, Brahim/0000-0001-6155-059X 1
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