Significantly Enhanced Ferroelectric and Dielectric Properties in BaTiO 3/LaNiO 3 Superlattices
18 Pages Posted: 14 Aug 2019 First Look: Under Review
BaTiO3/LaNiO3 (BTO/LNO) ferroelectric superlattices with different stacking periods have been prepared by pulsed laser deposition (PLD). Compared to the pure BTO films, the BTO/LNO superlattices have significantly enhanced ferroelectric and dielectric properties. This is because, in addition to the strain effect, the accumulated oxygen vacancies in each ultra-thin LNO layer can change the depolarization field and reduce the leakage current in the superlattices. Therefore, these results indicate that the use of ultra-thin metallic oxide layers as the constituent material of the ferroelectric superlattices is a feasible and effective way to improve the properties of superlattices.
Keywords: BaTiO3, superlattice, laser deposition, microstructure, electrical properties
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