Alloying of Co ultrathin films on Pt(111) with Ag buffer layers

uTaipei > College of Science > Department of Applied Physics and Chemistry > Periodical Articles > Item 987654321/2580

Please use this identifier to cite or link to this item: http://utaipeir.lib.utaipei.edu.tw/dspace/handle/987654321/2580

Title:	Alloying of Co ultrathin films on Pt(111) with Ag buffer layers
Authors:	Shern, C. S. Su, C. W. Wu, Y. E. Fu, T. Y. 何慧瑩
Contributors:	臺北市立教育大學自然科學系
Keywords:	cobalt silver platinum surface alloying interface structure chemical interdiffusion low energy electron diffraction ultraviolet photoelectron spectra Auger electron spectra monolayers cobalt alloys platinum alloys free energy surface energy
Date:	2000
Issue Date:	2009-07-27 15:18:29 (UTC+8)
Abstract:	The structure at the interfaces of Co/Ag/Pt(111) was studied by low-energy electron diffraction, ultraviolet photoelectron spectroscopy, Auger electron spectroscopy, and depth profiling. An atomic exchange occurs between Co and Ag before the formation of a Co-Pt alloy. Ag atoms start moving to the top at 425 K when the coverage of Co is one monolayer. The temperature of the complete exchange between Ag atoms and Co atoms is dependent on the thickness of the Ag buffer layer. The Co-Pt alloy develops after the atomic exchange is complete. The especially small surface free energy of Ag and large strain energy in this system are proposed as the driving force for the exchange.
Relation:	Journal of Applied Physics, V88(2), p.705-709
Appears in Collections:	[Department of Applied Physics and Chemistry] Periodical Articles

Files in This Item:

There are no files associated with this item.