Optimisation of superconducting thin films by TEM

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Bals, S. and Tendeloo, G. van and Rijnders, G. and Blank, D.H.A. and Leca, V. and Salluzzo, M. (2002) Optimisation of superconducting thin films by TEM. Physica C: Superconductivity, 372-37 (Part 2). pp. 711-714. ISSN 0921-4534

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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.
Item Type:Article
Copyright:© 2002 Elsevier Science
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/43585
Official URL:http://dx.doi.org/10.1016/S0921-4534(02)00838-9
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Metis ID: 206918