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

University of Taipei > 理學院 > 應用物理暨化學學系暨碩士班 > 期刊論文 > Item 987654321/2580

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题名:	Alloying of Co ultrathin films on Pt(111) with Ag buffer layers
作者:	Shern, C. S. Su, C. W. Wu, Y. E. Fu, T. Y. 何慧瑩
贡献者:	臺北市立教育大學自然科學系
关键词:	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
日期:	2000
上传时间:	2009-07-27 15:18:29 (UTC+8)
摘要:	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.
關聯:	Journal of Applied Physics, V88(2), p.705-709
显示于类别:	[應用物理暨化學學系暨碩士班] 期刊論文

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