title: Epitaxial Growth of SrTiO3Films on Cube-Textured Cu-Clad Substrates by PLD at Low Temperature Under Reducing Atmosphere.
abstract: The growth of epitaxial {001}<100> SrTiO3(STO) on low-cost cube-textured Cu-based clad substrate at low temperature was carried out by means of pulsed laser deposition (PLD). STO film was deposited in one step under a reducing atmosphere (5% H2and 95% Ar mixture) to prevent the oxidation of the metal surface. The optimization of PLD parameters leads to a sharpest biaxial texture at a temperature as low as 500 °C and a thickness of 500 nm with a (100) STO layer. The upper limit of highly textured STO thickness was also investigated. The maximum thickness which retains the best quality {001}<100> texture is 800 nm, since the texture is preserved not only through the layer but also on the surface. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) measurements showed that STO films are continuous, dense, and smooth with very low roughness (between 5 and 7 nm). This paper describes the development of STO layer by means of PLD in absence of oxygen throughout the process, suggesting an alternative and effective method for growing highly {001}<100> textured STO layer on low-cost metal substrates.
authors.affiliation: IN2UB, DIOPMA, Department of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain. japadilla@ub.edu.
authors.forename: J A
authors.initials: JA
authors.lastname: Padilla
authors.affiliation: IN2UB, DIOPMA, Department of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain. xuriguera@ub.edu.|La Farga Lacambra SAU, Ctra. C17z Km. 73, 5, 08508 Les Masies de Voltregà, Barcelona, Spain. xuriguera@ub.edu.
authors.forename: E
authors.initials: E
authors.lastname: Xuriguera
authors.affiliation: Department of Applied Physics and Optics, Universitat de Barcelona, C/Martí i Franquès 1, 08028, Barcelona, Spain.|Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, 08193, Bellaterra, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Rodríguez
authors.affiliation: Superconductivity Laboratory, ENEA Frascati Research Centre, Via Enrico Fermi 45, I-00044 Frascati, Rome, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Vannozzi
authors.affiliation: IN2UB, DIOPMA, Department of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Segarra
authors.affiliation: Superconductivity Laboratory, ENEA Frascati Research Centre, Via Enrico Fermi 45, I-00044 Frascati, Rome, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Celentano
authors.affiliation: Department of Applied Physics and Optics, Universitat de Barcelona, C/Martí i Franquès 1, 08028, Barcelona, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Varela
keywords: Electron diffraction; Epitaxy; High-temperature superconductivity; Pulsed laser deposition; Thin film texture; X-ray diffraction