Growth of ferroelectric Ba0.8Sr0.2TiO3 epitaxial films by ultraviolet pulsed laser irradiation of chemical solution derived precursor layers
Highly crystalline BaSrTiO (BST) are on (001)-oriented LaNiO-buffered LaAlO substrates by pulsed laser of solution derived barium-zirconium-titanium precursor layers using a UV Nd:YAG laser source at atmospheric conditions. The analyses of the obtained studied by X-ray and transmission electron microscopy, demonstrate that laser processing allows the of tens of nm-thick BST with crystalline similar to that of obtained through conventional thermal annealing methods. However, the fast pulsed nature of the laser employed leads to kinetic evolution orders of magnitude faster than in thermal treatments. The combination of specific and photochemical mechanisms is the main responsible for the ultrafast laser-induced Piezoresponse microscopy measurements demonstrate equivalent behavior in laser and thermally annealed being the piezoelectric constant ∼25 pm V−1.