Microstructure of laser-ablated superconducting La2CuO4Fx thin films on SrTiO3

Thin films of lanthanum cuprate were grown on SrTiO3 substrates by pulsed laser deposition and made superconducting (Tc ∼ 38 K) through the process of post-deposition fluorination using elemental fluorine. A microstructural analysis showed that the [110] zone of the film grows parallel to the [100]...

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Bibliographic Details
Published in:Journal of materials research 2001-11, Vol.16 (11), p.3309-3316
Main Authors: Kong, G., Jones, M. O., Abell, J. S., Edwards, P. P., Lees, S. T., Gibbons, K. E., Gameson, I., Aindow, M.
Format: Article
Language:English
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Summary:Thin films of lanthanum cuprate were grown on SrTiO3 substrates by pulsed laser deposition and made superconducting (Tc ∼ 38 K) through the process of post-deposition fluorination using elemental fluorine. A microstructural analysis showed that the [110] zone of the film grows parallel to the [100] zone of the SrTiO3 substrate, reducing the lattice mismatch from 37.5% to 2.4%. At the film–substrate interface there is an intermediate layer 3–4 nm thick and twin-related grains emanate from this region. Stacking faults are present in the bulk of the film, with misoriented subgrains present at the deposit surface.
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.2001.0455