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

Ching-Song Shern, S. Chen, J. Tsay, R. Chen

研究成果: 雜誌貢獻期刊論文同行評審

16 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)7328-7332
頁數5
期刊Physical Review B - Condensed Matter and Materials Physics
58
發行號11
DOIs
出版狀態已發佈 - 1998

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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