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Article Dans Une Revue Applied Physics Letters Année : 2014

Giant room-temperature barocaloric effect and pressure-mediated electrocaloric effect in BaTiO3 single crystal

Résumé

Barocaloric effect in BaTiO3 single crystal is studied by a thermodynamic phenomenological model. It is demonstrated that a giant barocaloric effect can be achieved near room temperature with an adiabatic temperature change of more than 3K and a temperature span about 50K. As expected, the electrocaloric peak can be shifted towards room temperature by pressure. However, a slight reduction of the electrocaloric peak is found in contrast to relaxor ferroelectrics and LiNbO3. We believe that our findings could open a potential route by combining the barocaloric effect and pressure-mediated electrocaloric effect in BaTiO3 single crystal for cooling devices.
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Dates et versions

hal-01053061 , version 1 (29-07-2014)

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Yehan Liu, J. Wei, P.-E. Janolin, I.C. Infante, X. Lou, et al.. Giant room-temperature barocaloric effect and pressure-mediated electrocaloric effect in BaTiO3 single crystal. Applied Physics Letters, 2014, 104, pp.162904. ⟨10.1063/1.4873162]⟩. ⟨hal-01053061⟩
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