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Title: Epitaxial growth of SrTiO3 films on cube-textured Cu-clad substrates by PLD at low temperature under reducing atmosphere
Author: Padilla Sánchez, José Antonio
Xuriguera Martín, María Elena
Rodríguez, L.
Vannozzi, A.
Segarra Rubí, Mercè
Celentano, G.
Varela Fernández, Manuel, 1956-
Keywords: Pel·lícules fines
Difracció d'electrons
Thin films
Electrons diffraction
Issue Date: 28-Mar-2017
Publisher: SpringerOpen
Abstract: The growth of epitaxial {001} 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% H2 and 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} 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} textured STO layer on low-cost metal substrates.
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It is part of: Nanoscale Research Letters, 2017, vol. 12, num. 226
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ISSN: 1931-7573
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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