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Piezoelectric Ba and Ti co-doped BiFeO3 textured films: selective growth of solid solutions or nanocomposites

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Abstract

Metal organic chemical vapor deposition (MOCVD) is exploited as a synthetic route to produce Ba and Ti co-doped BiFeO3 thin films. A facile approach based on a molten multi-component source, consisting of a Bi(phenyl)3, Fe(tmhd)3, Ba(hfa)2·tetraglyme and Ti(tmhd)2(O-iPr)2 (phenyl = –C6H5, H-tmhd = 2,2,6,6-tetramethyl-3,5-heptandione; O-iPr = iso-propoxide; H-hfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione; tetraglyme = CH3O(CH2CH2O)4CH3) mixture, is applied for the MOCVD based fabrication of doped BiFeO3 films on SrTiO3:Nb(100) substrates. The applied characterization techniques, such as X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM), provide a suitable correlation between processing parameters/precursor mixtures and the nature of the deposited films, in terms of the formation of solid solutions of the type Bi(1−x)BaxFe(1−y)TiyO3 vs. the formation of Bi(1−x)BaxFeO3/Bi(1−x)BaxFe(1−y)TiyO3 nanocomposite films. Piezoresponse force microscopy (PFM) is applied to correlate the nanostructure/composition and piezoelectric/ferroelectric properties.

Graphical abstract: Piezoelectric Ba and Ti co-doped BiFeO3 textured films: selective growth of solid solutions or nanocomposites

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Supplementary files

Article information


Submitted
18 Aug 2020
Accepted
24 Sep 2020
First published
25 Sep 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Piezoelectric Ba and Ti co-doped BiFeO3 textured films: selective growth of solid solutions or nanocomposites

Q. Micard, A. L. Pellegrino, R. Lo Nigro, A. Bartasyte, G. G. Condorelli and G. Malandrino, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC03930F

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