Optimisation of superconducting thin films by TEM

S. Bals, G. van Tendeloo, Augustinus J.H.M. Rijnders, David H.A. Blank, V. Leca, M. Salluzzo

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7 Citations (Scopus)

Abstract

High-resolution electron microscopy is used to study the initial growth of different REBa2Cu3O7−δ thin films. In DyBa2Cu3O7−δ ultra-thin films, deposited on TiO2 terminated SrTiO3, two different types of interface arrangements occur: bulk–SrO–TiO2–BaO–CuO–BaO–CuO2–Dy–CuO2–BaO–bulk and bulk–SrO–TiO2–BaO–CuO2–Dy–CuO2–BaO–CuO–BaO–bulk. This variable growth sequence is the origin of the presence of antiphase boundaries. In Nd1+xBa2−xCu3O7−δ thin films, antiphase boundaries tend to annihilate by the insertion of extra Nd-layers. This annihilation is correlated with the flat morphology of the film and the absence of growth spirals at the surface of the Nd-rich films.
Original languageUndefined
Pages (from-to)711-714
Number of pages4
JournalPhysica C
Volume372-376
Issue numberPart 2
DOIs
Publication statusPublished - 2002

Keywords

  • METIS-206918
  • IR-43585

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