Giant room-temperature elastocaloric effect in ferroelectric ultrathin films

Yang Liu; Ingrid C Infante; Xiaojie Lou; Laurent Bellaiche; James F Scott; Brahim Dkhil

doi:10.1002/adma.201401935

Giant room-temperature elastocaloric effect in ferroelectric ultrathin films

Adv Mater. 2014 Sep 17;26(35):6132-7. doi: 10.1002/adma.201401935. Epub 2014 Jul 19.

Authors

Yang Liu¹, Ingrid C Infante, Xiaojie Lou, Laurent Bellaiche, James F Scott, Brahim Dkhil

Affiliation

¹ Laboratoire Structures, Propriétés et Modélisation des Solides, UMR CNRS 8580, Ecole Centrale Paris, 92295, Châtenay-Malabry, France; Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, PR China.

PMID: 25042767
DOI: 10.1002/adma.201401935

Abstract

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.

Keywords: elastocaloric effect; electrocaloric effect; epitaxial ferroelectric ultrathin films; hysteresis loss.

Publication types

Research Support, Non-U.S. Gov't