Atomic arrangement on ZrO/W(100) cathode surface - models for LEED intensity vs. voltage analysis

Satoru Kawata, Masayoshi Oka, Taichi Takami, Seigi Mizuno, Hideaki Nakane, Hiroshi Adachi

    Research output: Contribution to journalConference article

    3 Citations (Scopus)

    Abstract

    The ZrO/W(100) thermal field emitter has been widely used for cathodes in electron microscopy because this surface shows a remarkably low work function. In spite of its wide application, the reducing mechanism of the work function has not been clearly understood. On the ZrO/W(100) surface, Zr is considered to be located at an outermost position and O is just below it because the Zr-O pair has an electric dipole whose positive side is Zr, and it makes an electric double layer, which is reasonable for work function reducing. For confirmation of the atomic arrangement, low-energy electron diffraction (LEED) intensity vs. voltage (I-V) analysis was done. At stage 1 of LEED I-V analysis, the most simple models were built and calculated. The result showed poor possibility of these models. Several more complex models, which should be considered, are shown in this study.

    Original languageEnglish
    Pages (from-to)408-411
    Number of pages4
    JournalApplied Surface Science
    Volume146
    Issue number1
    DOIs
    Publication statusPublished - May 1999
    EventProceedings of the 1998 2nd International Vacuum Electron Sources Conference, IVESC-98 - Tsukuba, Jpn
    Duration: Jul 7 1998Jul 10 1998

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Condensed Matter Physics
    • Physics and Astronomy(all)
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

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