Origin of large negative electrocaloric effect in antiferroelectric PbZr O3
Vales Castro, Pablo (Institut Català de Nanociència i Nanotecnologia)
Faye, Romain (Luxembourg Institute of Science and Technology. Materials Research and Technology Department)
Vellvehi, Miquel (Institut de Microelectrònica de Barcelona)
Nouchokgwe, Youri (University of Luxembourg)
Perpiñà Giribet, Xavier (Institut de Microelectrònica de Barcelona)
Caicedo Roque, Jose Manuel (Institut Català de Nanociència i Nanotecnologia)
Jordà, Xavier (Institut de Microelectrònica de Barcelona)
Roleder, Krystian (University of Silesia in Katowice. Institute of Physics)
Kajewski, Dariusz (University of Silesia in Katowice. Institute of Physics)
Perez-Tomas, Amador (Institut Català de Nanociència i Nanotecnologia)
Defay, Emmanuel (Luxembourg Institute of Science and Technology. Materials Research and Technology Department)
Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)

Date:	2021
Abstract:	We have studied the electrocaloric response of the archetypal antiferroelectric PbZrO3 as a function of voltage and temperature in the vicinity of its antiferroelectric-paraelectric phase transition. Large electrocaloric effects of opposite signs, ranging from an electrocooling of -3. 5 K to an electroheating of +5. 5K, were directly measured with an infrared camera. We show by calorimetric and electromechanical measurements that the large negative electrocaloric effect comes from an endothermic antiferroelectric-ferroelectric switching, in contrast to dipole destabilization of the antiparallel lattice, previously proposed as an explanation for the negative electrocaloric effect of antiferroelectrics.
Grants:	Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad MAT2016-77100-C2-1-P Ministerio de Economía y Competitividad BES-2016-077392 Ministerio de Ciencia e Innovación RTI2018-098392-B-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1384
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Anti ferroelectrics ; Electro-caloric effects ; Electrocaloric ; Electroheating ; Electromechanical measurements ; Ferroelectric switching ; Infra-red cameras ; Paraelectric phase transition
Published in:	Physical review B, Vol. 103 Núm. 5 (Feb. 2021) , art. 54112, ISSN 2469-9969

DOI: 10.1103/PhysRevB.103.054112

Postprint 30 p, 3.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles