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

C. S. Shern; C. W. Su; Y. E. Wu; T. Y. Fu

doi:10.1063/1.373725

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

C. S. Shern^*, C. W. Su, Y. E. Wu, T. Y. Fu

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

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.

Original language	English
Pages (from-to)	705-709
Number of pages	5
Journal	Journal of Applied Physics
Volume	88
Issue number	2
DOIs	https://doi.org/10.1063/1.373725
Publication status	Published - 2000 Jul 15

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.373725

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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.",

author = "Shern, {C. S.} and Su, {C. W.} and Wu, {Y. E.} and Fu, {T. Y.}",

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AU - Shern, C. S.

AU - Su, C. W.

AU - Wu, Y. E.

AU - Fu, T. Y.

PY - 2000/7/15

Y1 - 2000/7/15

N2 - 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.

AB - 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.

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

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