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Pàgina inicial > Articles > Articles publicats > Origin of large negative electrocaloric effect in antiferroelectric PbZr O3 |
Data: | 2021 |
Resum: | 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. |
Ajuts: | 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 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Anti ferroelectrics ; Electro-caloric effects ; Electrocaloric ; Electroheating ; Electromechanical measurements ; Ferroelectric switching ; Infra-red cameras ; Paraelectric phase transition |
Publicat a: | Physical review B, Vol. 103 Núm. 5 (Feb. 2021) , art. 54112, ISSN 2469-9969 |
Postprint 30 p, 3.1 MB |