Giant room-temperature elastocaloric effect in ferroelectric ultrathin films

Y. Liu (1) , I.C. Infante (1) , X. Lou (2) , L. Bellaiche (3) , J.F. Scott (4) , B. Dkhil (1)

1 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
2 Multi-disciplinary Materials Research Center
3 Department of Physics Department [Fayetteville]
4 Cavendish Laboratory

Environmentally friendly ultrathin BaTiO3 capacitors can exhibit a giant stress-induced elastocaloric effect without hysteresis loss or Joule heating. By combining this novel elastocaloric effect with the intrinsic electrocaloric effect, an ideal refrigeration cycle with high performance (temperature change over 10 K with a wide working-temperature window of 60 K) at room temperature is proposed for future cooling applications. © 2014 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim.

Mots clés: elastocaloric effect; electrocaloric effect; epitaxial ferroelectric ultrathin films; hysteresis loss

Domaines: Matériaux

Y. Liu, I.C. Infante, X. Lou, L. Bellaiche, J.F. Scott, et al.. Giant room-temperature elastocaloric effect in ferroelectric ultrathin films. Advanced Materials, 2014, 26 (35), pp.6132-6137. ⟨10.1002/adma.201401935⟩. ⟨hal-02269355⟩