Synthesis and characterization of PMN-PT thin films prepared by a new chemical route

M.L. SANTIAGO; M.G.STACHIOTTI; R.MACHADO; N. PELLEGRI; O. DE SANCTIS

FERROELECTRICS

Taylor & Francis

Año: 2008 vol. 370 p. 85 - 93

0015-0193

Thin films of lead magnesium niobate-lead titanate (PMN-PT) have been synthesized by a new and simple chemical solution deposition route, using Acetoin (3-Hydroxy 2-butanone) as chelating agent and methanol as solvent.  The starting materials were Niobium ethoxide, Titanium butoxide, Magnesium ethoxide and Lead acetate. The films were deposited on Pt/Ti/SiO2/Si substrates by spin-coating.  By a multilayer process, homogenous and crack-free films with thickness up to 1 mm were obtained.  The microstructure and surface morphology of the films were characterized by X-ray diffraction and atomic force microscopy (AFM) techniques. Films with a predominant perovskite phase and average grain size of ~200 nm were obtained.  The dielectric and ferroelectric properties are reported.