Optimisation of superconducting thin films by TEM


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.
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Copyright:© 2002 Elsevier Science
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