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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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
Issue numberSPEC.
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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    Mori, Y., Tanemura, S., Koide, S., Senzaki, Y., Jin, P., Kaneko, K., Terai, A., & Nabotova-Gabin, N. (2003). Thermo-coloration of SmS thin flims by XPS in situ observation. Applied Surface Science, 212-213(SPEC.), 38-42.