Effect of annealing of Ag ultrathin films on Co/Pt(111) surface

Ching-Song Shern, Jyh-Shen Tsay, S. L. Chen, Y. E. Wu

研究成果: 雜誌貢獻文章同行評審

6 引文 斯高帕斯(Scopus)

摘要

Low-energy electron diffraction was used to study the annealing effects of Ag ultrathin films on the surface of one monolayer Co/Pt(111). The intensity of the specular beam versus temperature has an unusual minimum point and maximum point. Further studies by Auger electron spectroscopy indicate that the adatoms of Ag become a best ordered state after the formation of Co-Pt alloy is complete. The new order state comes from the structure change of Co/Pt(111) and the smaller lattice mismatch between Ag and Pt. The electron density of states of d band shifts to a lower binding energy when the system starts to form the Co-Pt alloy measured by ultraviolet photoelectron spectroscopy. The chemical compositions at interfaces of the thin film were investigated by a depth profile before and after the annealing. The sputtering rates of Ag on the topmost layer of the unannealed film and the annealed film were calculated and comparatively studied. A shadow effect causes the different sputtering rates of these two ultrathin films.

原文英語
頁(從 - 到)228-232
頁數5
期刊Journal of Applied Physics
85
發行號1
DOIs
出版狀態已發佈 - 1999 十二月 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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