期刊
APPLIED PHYSICS LETTERS
卷 104, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4866272
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资金
- Agence Nationale pour la Recherche through NOMILOPS [ANR-11-BS10-016-02]
- China Scholarship Council (CSC)
- National Science Foundation of China (NSFC) [51272204, 51372195]
- Fundamental Research Funds for the Central Universities [2013JDGZ03]
- National Key Laboratory of Shock Wave and Detonation Physics [LSD201201003]
Room-temperature electrocaloric properties of Pt/BaTiO3/SrRuO3 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 Delta T 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 Delta T being over 4.5 K can be achieved at room temperature, which demonstrates the perspective of FTJs as a promising solid-state refrigeration. (C) 2014 AIP Publishing LLC.
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