Lecture
WEB MOCVD of Piezoelectric Ba and Ti co-doped BiFeO3: between nanocomposites and solid solutions
Thursday (24.09.2020) 15:40 - 15:55 Z: Special Symposia I Part of:Systems combining BiFeO3 and BaTiO3 (BFO-BTO) in a solid solution are promising candidate for energy storage application [1][2]. Also, the combination of BaTiO3 with BiFeO3 reduce material leakage current and so gives great opportunity for improving multiferroic properties. Those systems have been mainly obtained as ceramic mixed systems, mixed nanocrystalline materials or layered structures; some films have been prepared by PLD, sputtering or solution processes [3][4]. In this context, we propose a one-step MOCVD process as a synthetic route to produce Ba and Ti co-doped BiFeO3 thin films. Here, a molten multi-component source, consisting of the Bi(phenyl)3, Fe(tmhd)3, Ba(hfa)2•tetraglyme and Ti(tmhd)2(O-iPr)2 mixture, is applied for the MOCVD fabrication of the films on SrTiO3:Nb (100) substrates. The deposited solid solutions of the type Bi(1-x)BaxBiFe(1-y)TiyO3 and the formation of Bi(1-x)BaxFeO3/Bi(1-x)BaxFe(1-y)TiyO3 nanocomposite films have been investigated through : 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). Finally, piezoresponse force microscopy (PFM) is used to correlate the nanostructure/composition and piezoelectric/ferroelectric properties. [5]
Acknowledgment:
This work is supported by the European Community under the Horizon 2020 Programme in the form of the MSCA-ITN-2016 ENHANCE project, Grant Agreement N.722496.
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[5] Q. Micard, A. L. Pellegrino, R. Lo Nigro, A. Bartasyte, G. G. Condorelli, G. Malandrino, Piezoelectric Ba and Ti co-doped BiFeO3 textured films grown on niobium doped SrTiO3 (100) substrates: nanocomposites or solid solutions?, Adv. Mater. Interface, Submitted
