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Epitaxial growth of SrTiO3 films on cube-textured Cu-clad substrates by PLD at low temperature under reducing atmosphere

AuthorsPadilla, J. A.; Xuriguera, E.; Rodríguez, L.; Vannozzi, A.; Segarra, M.; Celentano, G.; Varela, M.
X-ray diffraction
High-temperature superconductivity
Pulsed laser deposition
Electron diffraction
Thin film texture
Issue Date2017
PublisherSpringer Nature
CitationNanoscale Research Letters 12(1): 226 (2017)
AbstractThe growth of epitaxial {001}<100> SrTiO (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% H 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}<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.
Publisher version (URL)https://doi.org/10.1186/s11671-017-1997-9
Identifiersdoi: 10.1186/s11671-017-1997-9
e-issn: 1556-276X
issn: 1931-7573
Appears in Collections:(CIN2) Artículos
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