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    Microstructural evolutions in converting epitaxial Tl2Ba2CaCu2Ox thin films to epitaxial HgBa2CaCu2O6+delta thin films

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    Issue Date
    2003-02-01
    Author
    Wu, Judy Z.
    Siegal, M. P.
    Xie, Y. Y.
    Aytug, T.
    Fang, L.
    Publisher
    AMER INST PHYSICS
    Type
    Article
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    Abstract
    Superconducting HgBa2CaCu2O6+delta (Hg-1212) thin films were obtained from Tl2Ba2CaCu2Ox (Tl-2212) precursor films using a cation-exchange process. In this process, Tl cations on the precursor lattice were thermally excited and then replaced with Hg cations. The mechanism of such an atomic perturbation process has presented an interesting topic in material research. This work investigated the evolution of the crystalline structure and surface morphology of the film during such a conversion. It has been found that the Hg-1212 films may inherit epitaxy and surface morphology from their Tl2Ba2CaCu2Ox precursor films at the low perturbation energy limit. Although the c-axis lattice constant was reduced from 1.48 rim. for Tl-2212 to 1.27 nm for Hg-1212 during the cation exchange, the in-plane texture of the film remains. The inverse conversion from Hg-1212 to Tl-2212 has also been investigated. Hg-1212 is found to be energetically preferred so that a perturbation above a threshold is required to convert it back to Tl-2212. (C) 2003 American Institute of Physics. [DOI: 10.1063/1.1529305].
    URI
    http://hdl.handle.net/1808/1694
    DOI
    https://doi.org/10.1063/1.1529305
    Collections
    • Distinguished Professors Scholarly Works [918]
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Yan, SL; Fang, L; Aytug, T; Xie, YY; Wu, JZ; Siegal, MP. Microstructural evolutions in converting epitaxial Tl2Ba2CaCu2Ox thin films to epitaxial HgBa2CaCu2O6+delta thin films. JOURNAL OF APPLIED PHYSICS. FEB 1 2003. 93(3): 1666-1671.

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    785-864-8983

    KU Libraries
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    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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