Structure evolution for annealing Co ultrathin films on Pt (111)

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Abstract

Low-energy electron diffraction (LEED), Auger electron spectroscopy (AES) and ultraviolet photelectron spectroscopy (UPS) were used to study the thermal evolution of the structure of cobalt ultrathin films on a Pt(111) surface at different coverages. The phase diagram of surface structures was obtained from LEED observation. Several structural phases of this system were observed, i.e. pseudo-(1 × 1), incoherent epitaxy, extra p(2 × 2), rotational incoherent epitaxy, and alloying (1 × 1) structures. The coverage and temperature ranges were examined for each structure. Alloy formation was verified by AES. The changes in valence-band structures during phase transitions were studied by UPS.

Original languageEnglish
Pages (from-to)313-318
Number of pages6
JournalSurface Science
Volume396
Issue number1-3
DOIs
Publication statusPublished - 1998 Jan

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Keywords

  • Annealing
  • Auger electron spectroscopy
  • Cobalt
  • Low-energy electron diffraction
  • Metal-metal nonmagnetic heterostructure
  • Platinum
  • Surface structure
  • Ultraviolet photoelectron spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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