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 |
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頁(從 - 到) | 7328-7332 |
頁數 | 5 |
期刊 | Physical Review B - Condensed Matter and Materials Physics |
卷 | 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