Thermo-coloration of SmS thin flims by XPS in situ observation

Y. Mori, S. Tanemura, S. Koide, Y. Senzaki, P. Jin, K. Kaneko, A. Terai, N. Nabotova-Gabin

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    17 Citations (Scopus)

    Abstract

    We observed new "thermo-coloration" of the surface layer of SmS film in which it turned from blue-black to gold after annealing at 650 °C for 1h in vacuum. X-ray photoelectron spectroscopy (XPS) was applied to investigate the chemical state of SmS. This phenomenon is different from the previously reported works. The contribution of Sm 3+ state dramatically increased upon annealing. This implied that SmS film changes from semiconductor phase to the metal one and Sm oxide. Consequently, it is suggested that new thermo-coloration of SmS film is caused by the phase transition from semiconductor to metal under the presence of Sm oxide.

    Original languageEnglish
    Pages (from-to)38-42
    Number of pages5
    JournalApplied Surface Science
    Volume212-213
    Issue numberSPEC.
    DOIs
    Publication statusPublished - May 15 2003

    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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