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  • 1
    Electronic Resource
    Electronic Resource
    Observation of superstructures on the surfaces of sputtered YBa2Cu3O7−x thin films by low-energy electron diffraction (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 1465-1467 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The surface structures of sputtered c-axis-oriented YBa2Cu3O7−x (YBCO) thin films were studied by means of low-energy diffraction (LEED). The in situ analysis, without exposing the films to air, showed the formation of superstructures of the YBCO (001) 2×2 and YBCO (001) 4×1 type. Air-exposed surfaces showed no LEED pattern but could be transformed into the YBCO (001) 2×2 structure by annealing at 500 °C. The observed superstructures are interpreted as being due to oxygen loss of the YBCO surface region, causing an oxygen vacancy ordering in the basal CuO planes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107519
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