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Title

Untangling Electrostatic and Strain Effects on the Polarization of Ferroelectric Superlattices

AuthorsKhestanova, Ekaterina; Dix, Nico ; Fina, Ignasi ; Scigaj, Mateusz ; Rebled, José Manuel ; Herranz, Gervasi ; Fontcuberta, Josep ; Sánchez Barrera, Florencio
KeywordsThin films
Epitaxy
Oxides
Ferroelectric superlattices
BaTiO3
Issue Date20-Sep-2016
PublisherWiley-VCH
CitationAdvanced Functional Materials 26(35): 6446–6453 (2016)
AbstractThe polarization of ferroelectric superlattices is determined by both electrical boundary conditions at the ferroelectric/paraelectric interfaces and lattice strain. The combined infl uence of both factors offers new opportunities to tune ferroelectricity. However, the experimental investigation of their individual impact has been elusive because of their complex interplay. Here, a simple growth strategy has permitted to disentangle both contributions by an independent control of strain in symmetric superlattices. It is found that fully strained short-period superlattices display a large polarization whereas a pronounced reduction is observed for longer multilayer periods. This observation indicates that the electrostatic boundary mainly governs the ferroelectric properties of the multilayers whereas the effects of strain are relatively minor.
DescriptionKhestanova, Ekaterina et al.
Publisher version (URL)http://dx.doi.org/10.1002/adfm.201602084
URIhttp://hdl.handle.net/10261/137158
DOI10.1002/adfm.201602084
ISSN1616-301X
Appears in Collections:(ICMAB) Artículos
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