Studies of the surface structure of YBa2Cu3O7 thin films using STM

I. Maggio-Aprile, A. D. Kent, Ph Niedermann, Ch Renner, L. Antognazza, L. Miéville, O. Brunner, J. M. Triscone, [No Value] Fischer

    Research output: Contribution to journalArticle

    Abstract

    The surface structure of magnetron-sputtered YBa2Cu3O7 thin films has been investigated using an STM operated in air. Both c-axis and a-axis oriented films have been investigated. In the case of c-axis thin films, different types of step and plateau structures are observed depending on the deposition conditions and substrates used (SrTiO3 and MgO), suggesting different growth behavior. In some cases, very regularly spaced parallel plateaus separated by steps are found, suggesting directional step flow; whereas in other cases, more complex surface structures with circular plateaus and screw dislocations are seen. In the case of a-axis growth, the substrate determines the grain orientation and results in a cobblestone appearance of the film surface. The tunneling conditions necessary for obtaining stable and reproducible images of the surface are discussed as well as attempts to correlate the deposition parameters with the resulting film surface structure.

    Original languageEnglish (US)
    Pages (from-to)728-733
    Number of pages6
    JournalUltramicroscopy
    Volume42-44
    Issue numberPART 1
    DOIs
    StatePublished - 1992

    Fingerprint

    Surface structure
    Thin films
    thin films
    plateaus
    Screw dislocations
    Substrates
    screw dislocations
    Air
    barium copper yttrium oxide
    air
    strontium titanium oxide

    ASJC Scopus subject areas

    • Materials Science(all)
    • Instrumentation

    Cite this

    Maggio-Aprile, I., Kent, A. D., Niedermann, P., Renner, C., Antognazza, L., Miéville, L., ... Fischer, N. V. (1992). Studies of the surface structure of YBa2Cu3O7 thin films using STM. Ultramicroscopy, 42-44(PART 1), 728-733. https://doi.org/10.1016/0304-3991(92)90349-O

    Studies of the surface structure of YBa2Cu3O7 thin films using STM. / Maggio-Aprile, I.; Kent, A. D.; Niedermann, Ph; Renner, Ch; Antognazza, L.; Miéville, L.; Brunner, O.; Triscone, J. M.; Fischer, [No Value].

    In: Ultramicroscopy, Vol. 42-44, No. PART 1, 1992, p. 728-733.

    Research output: Contribution to journalArticle

    Maggio-Aprile, I, Kent, AD, Niedermann, P, Renner, C, Antognazza, L, Miéville, L, Brunner, O, Triscone, JM & Fischer, NV 1992, 'Studies of the surface structure of YBa2Cu3O7 thin films using STM', Ultramicroscopy, vol. 42-44, no. PART 1, pp. 728-733. https://doi.org/10.1016/0304-3991(92)90349-O
    Maggio-Aprile I, Kent AD, Niedermann P, Renner C, Antognazza L, Miéville L et al. Studies of the surface structure of YBa2Cu3O7 thin films using STM. Ultramicroscopy. 1992;42-44(PART 1):728-733. https://doi.org/10.1016/0304-3991(92)90349-O
    Maggio-Aprile, I. ; Kent, A. D. ; Niedermann, Ph ; Renner, Ch ; Antognazza, L. ; Miéville, L. ; Brunner, O. ; Triscone, J. M. ; Fischer, [No Value]. / Studies of the surface structure of YBa2Cu3O7 thin films using STM. In: Ultramicroscopy. 1992 ; Vol. 42-44, No. PART 1. pp. 728-733.
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    AU - Kent, A. D.

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    AU - Antognazza, L.

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    AU - Triscone, J. M.

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    AB - The surface structure of magnetron-sputtered YBa2Cu3O7 thin films has been investigated using an STM operated in air. Both c-axis and a-axis oriented films have been investigated. In the case of c-axis thin films, different types of step and plateau structures are observed depending on the deposition conditions and substrates used (SrTiO3 and MgO), suggesting different growth behavior. In some cases, very regularly spaced parallel plateaus separated by steps are found, suggesting directional step flow; whereas in other cases, more complex surface structures with circular plateaus and screw dislocations are seen. In the case of a-axis growth, the substrate determines the grain orientation and results in a cobblestone appearance of the film surface. The tunneling conditions necessary for obtaining stable and reproducible images of the surface are discussed as well as attempts to correlate the deposition parameters with the resulting film surface structure.

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