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Author Queraltó, A. ♦ Pérez del Pino, A. ♦ Mata, M. de la ♦ Tristany, M. ♦ Gómez, A. ♦ Obradors, X. ♦ Puig, T. ♦ Arbiol, J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ANNEALING ♦ FERROELECTRIC MATERIALS ♦ LASER RADIATION ♦ NEODYMIUM LASERS ♦ THIN FILMS ♦ TRANSMISSION ELECTRON MICROSCOPY
Abstract Highly crystalline epitaxial Ba{sub 0.8}Sr{sub 0.2}TiO{sub 3} (BST) thin-films are grown on (001)-oriented LaNiO{sub 3}-buffered LaAlO{sub 3} substrates by pulsed laser irradiation of solution derived barium-zirconium-titanium precursor layers using a UV Nd:YAG laser source at atmospheric conditions. The structural analyses of the obtained films, studied by X-ray diffractometry and transmission electron microscopy, demonstrate that laser processing allows the growth of tens of nm-thick BST epitaxial films with crystalline structure similar to that of films obtained through conventional thermal annealing methods. However, the fast pulsed nature of the laser employed leads to crystallization kinetic evolution orders of magnitude faster than in thermal treatments. The combination of specific photothermal and photochemical mechanisms is the main responsible for the ultrafast epitaxial laser-induced crystallization. Piezoresponse microscopy measurements demonstrate equivalent ferroelectric behavior in laser and thermally annealed films, being the piezoelectric constant ∼25 pm V{sup −1}.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-06-29
Publisher Place United States
Journal Applied Physics Letters
Volume Number 106
Issue Number 26


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