Stabilization of Co/Pt(111) against surface alloying by Ag overlayers

C. Shern, S. Chen, J. Tsay, R. Chen

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The initial growth and annealing effects of Ag ultrathin films on the surface of 1 ML Co/Pt(111) were investigated by low-energy electron diffraction (LEED), Auger electron spectroscopy, and ultraviolet photoelectron spectroscopy. The Ag atoms are in a layer-by-layer growth only of the first two atomic layers. Within these coverages, the adatoms of Ag are in instability when the substrate starts Co-Pt alloying. The intensity of the specular beam of LEED versus temperature increases dramatically after the alloy formation is complete. The temperature of the formation of the Co-Pt alloy becomes higher as the coverage of Ag increases. These unusual phenomena are, to our knowledge, the first observation in the systems containing three-component ultrathin films. The stress of overlayers causing the change of the alloying temperature is proposed.

Original languageEnglish
Pages (from-to)7328-7332
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume58
Issue number11
DOIs
Publication statusPublished - 1998 Jan 1

Fingerprint

Alloying
alloying
Stabilization
Low energy electron diffraction
Ultrathin films
stabilization
electron diffraction
Ultraviolet photoelectron spectroscopy
Adatoms
ultraviolet spectroscopy
Auger electron spectroscopy
Temperature
adatoms
Auger spectroscopy
temperature
electron spectroscopy
photoelectron spectroscopy
Annealing
Atoms
annealing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Stabilization of Co/Pt(111) against surface alloying by Ag overlayers. / Shern, C.; Chen, S.; Tsay, J.; Chen, R.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 58, No. 11, 01.01.1998, p. 7328-7332.

Research output: Contribution to journalArticle

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