Abstract
Continuous, phase-pure, oriented yttrium barium cuprate (YBa2Cu3O7) films have been grown by deposition from metalorganic solutions onto lanthanum aluminate substrates and a nickel-tungsten tape with a barrier ceria layer. A “through” process has been used in which a ceria barrier layer and yttrium barium cuprate film grow from chemical solutions. In all steps of the process, the elemental composition of the deposits (Y: Ba: Cu molar ratio) was close to 1: 2: 3. The nanometer-scale structural evolution and phase formation in the YBa2Cu3O7 films have been studied in detail. Depending on synthesis conditions, yttrium barium cuprate films may consist of three-dimensional, platelike, or flaky micro- and nanocrystallites. The degree of orientation of the atomic lattice of the targeted film may vary from partial ordering to a planar texture with an 〈001〉 axis normal to the substrate and with a pronounced azimuthal orientation of the crystallites. The degree of orientation was higher when trifluoroacetate solutions were used.
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Original Russian Text © Yu.Ya. Tomashpolsky, L.F. Rybakova, N.V. Sadovskaya, S.Yu. Kholopova, Yu.V. Borisov, 2012, published in Neorganicheskie Materialy, 2012, Vol. 48, No. 1, pp. 51–56.
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Tomashpolsky, Y.Y., Rybakova, L.F., Sadovskaya, N.V. et al. Nanostructured phase formation in YBa2Cu3O7/LaAlO3 and YBa2Cu3O7/CeO2/(Ni-W) prepared by deposition from metalorganic solutions. Inorg Mater 48, 45–50 (2012). https://doi.org/10.1134/S002016851112020X
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DOI: https://doi.org/10.1134/S002016851112020X