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Title: Giant electrocaloric effect in asymmetric ferroelectric tunnel junctions at room temperature

Abstract

Room-temperature electrocaloric properties of Pt/BaTiO{sub 3}/SrRuO{sub 3} ferroelectric tunnel junctions (FTJs) are studied by using a multiscale thermodynamic model. It is found that there is a divergence in the adiabatic temperature change ΔT for the two opposite polarization orientations. This difference under a typical writing voltage of 3 V can reach over 1 K as the barrier thickness decreases. Thanks to the ultrahigh external stimulus, a giant electrocaloric effect (1.53 K/V) with ΔT being over 4.5 K can be achieved at room temperature, which demonstrates the perspective of FTJs as a promising solid-state refrigeration.

Authors:
; ;  [1];  [2]
  1. Laboratoire Structures, Propriétés et Modélisation des Solides, UMR 8580 CNRS-Ecole Centrale Paris, Grande Voie des Vignes, Châtenay-Malabry Cedex 92295 (France)
  2. 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 (China)
Publication Date:
OSTI Identifier:
22293106
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM COMPOUNDS; ELECTRIC POTENTIAL; FERROELECTRIC MATERIALS; PLATINUM COMPOUNDS; POLARIZATION; RUTHENIUM OXIDES; SUPERCONDUCTING JUNCTIONS; TEMPERATURE RANGE 0273-0400 K; THERMODYNAMIC MODEL; THERMOELECTRIC PROPERTIES; TITANATES; TUNNEL EFFECT

Citation Formats

Liu, Yang, Infante, Ingrid C., Dkhil, Brahim, and Lou, Xiaojie. Giant electrocaloric effect in asymmetric ferroelectric tunnel junctions at room temperature. United States: N. p., 2014. Web. doi:10.1063/1.4866272.
Liu, Yang, Infante, Ingrid C., Dkhil, Brahim, & Lou, Xiaojie. Giant electrocaloric effect in asymmetric ferroelectric tunnel junctions at room temperature. United States. https://doi.org/10.1063/1.4866272
Liu, Yang, Infante, Ingrid C., Dkhil, Brahim, and Lou, Xiaojie. Mon . "Giant electrocaloric effect in asymmetric ferroelectric tunnel junctions at room temperature". United States. https://doi.org/10.1063/1.4866272.
@article{osti_22293106,
title = {Giant electrocaloric effect in asymmetric ferroelectric tunnel junctions at room temperature},
author = {Liu, Yang and Infante, Ingrid C. and Dkhil, Brahim and Lou, Xiaojie},
abstractNote = {Room-temperature electrocaloric properties of Pt/BaTiO{sub 3}/SrRuO{sub 3} ferroelectric tunnel junctions (FTJs) are studied by using a multiscale thermodynamic model. It is found that there is a divergence in the adiabatic temperature change ΔT for the two opposite polarization orientations. This difference under a typical writing voltage of 3 V can reach over 1 K as the barrier thickness decreases. Thanks to the ultrahigh external stimulus, a giant electrocaloric effect (1.53 K/V) with ΔT being over 4.5 K can be achieved at room temperature, which demonstrates the perspective of FTJs as a promising solid-state refrigeration.},
doi = {10.1063/1.4866272},
url = {https://www.osti.gov/biblio/22293106}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 8,
volume = 104,
place = {United States},
year = {2014},
month = {2}
}