Layer structure of ultrathin Ag films on Ni/Pt(111)

H. Y. Ho; Y. J. Chen; C. W. Su; R. H. Chen; C. S. Shern

doi:10.1116/1.2208993

Layer structure of ultrathin Ag films on Ni/Pt(111)

H. Y. Ho, Y. J. Chen, C. W. Su, R. H. Chen, C. S. Shern

Department of Physics

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

2 Citations (Scopus)

Abstract

The layer structure of Ag on a NiPt (111) surface after high temperature annealing was studied by Auger electron spectroscopy, depth profile of Ar ion sputtering, and low-energy electron diffraction (LEED). A structural phase p (2×2) LEED pattern was observed in one atomic monolayer (ML) on 1 ML NiPt (111) surface after annealing at 800 K. Based on observations of the change of ion sputtering rates for the Ag overlayers, the LEED pattern, and minimum strain energy, we propose a layer structure of Ag for 1 ML Ag/1 ML NiPt (111) after the 800 K annealing. The compositions in the subsurface region are 0.25 ML Ag in p (2×2) structure on the topmost layer, Ag75 Ni25 alloy in the second layer, and Ni-Pt alloy in the remaining layers of the subsurface regions.

Original language	English
Article number	120604JVA
Pages (from-to)	1020-1023
Number of pages	4
Journal	Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume	24
Issue number	4
DOIs	https://doi.org/10.1116/1.2208993
Publication status	Published - 2006 Jul

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films

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title = "Layer structure of ultrathin Ag films on Ni/Pt(111)",

abstract = "The layer structure of Ag on a NiPt (111) surface after high temperature annealing was studied by Auger electron spectroscopy, depth profile of Ar ion sputtering, and low-energy electron diffraction (LEED). A structural phase p (2×2) LEED pattern was observed in one atomic monolayer (ML) on 1 ML NiPt (111) surface after annealing at 800 K. Based on observations of the change of ion sputtering rates for the Ag overlayers, the LEED pattern, and minimum strain energy, we propose a layer structure of Ag for 1 ML Ag/1 ML NiPt (111) after the 800 K annealing. The compositions in the subsurface region are 0.25 ML Ag in p (2×2) structure on the topmost layer, Ag75 Ni25 alloy in the second layer, and Ni-Pt alloy in the remaining layers of the subsurface regions.",

author = "Ho, {H. Y.} and Chen, {Y. J.} and Su, {C. W.} and Chen, {R. H.} and Shern, {C. S.}",

note = "Funding Information: This work was supported by the National Science Council of the Republic of China under Grant No. NSC 94-2112-M-003-016. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2006",

month = jul,

doi = "10.1116/1.2208993",

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volume = "24",

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T1 - Layer structure of ultrathin Ag films on Ni/Pt(111)

AU - Ho, H. Y.

AU - Chen, Y. J.

AU - Su, C. W.

AU - Chen, R. H.

AU - Shern, C. S.

N1 - Funding Information: This work was supported by the National Science Council of the Republic of China under Grant No. NSC 94-2112-M-003-016. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2006/7

Y1 - 2006/7

N2 - The layer structure of Ag on a NiPt (111) surface after high temperature annealing was studied by Auger electron spectroscopy, depth profile of Ar ion sputtering, and low-energy electron diffraction (LEED). A structural phase p (2×2) LEED pattern was observed in one atomic monolayer (ML) on 1 ML NiPt (111) surface after annealing at 800 K. Based on observations of the change of ion sputtering rates for the Ag overlayers, the LEED pattern, and minimum strain energy, we propose a layer structure of Ag for 1 ML Ag/1 ML NiPt (111) after the 800 K annealing. The compositions in the subsurface region are 0.25 ML Ag in p (2×2) structure on the topmost layer, Ag75 Ni25 alloy in the second layer, and Ni-Pt alloy in the remaining layers of the subsurface regions.

AB - The layer structure of Ag on a NiPt (111) surface after high temperature annealing was studied by Auger electron spectroscopy, depth profile of Ar ion sputtering, and low-energy electron diffraction (LEED). A structural phase p (2×2) LEED pattern was observed in one atomic monolayer (ML) on 1 ML NiPt (111) surface after annealing at 800 K. Based on observations of the change of ion sputtering rates for the Ag overlayers, the LEED pattern, and minimum strain energy, we propose a layer structure of Ag for 1 ML Ag/1 ML NiPt (111) after the 800 K annealing. The compositions in the subsurface region are 0.25 ML Ag in p (2×2) structure on the topmost layer, Ag75 Ni25 alloy in the second layer, and Ni-Pt alloy in the remaining layers of the subsurface regions.

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JF - Journal of Vacuum Science and Technology A

SN - 0734-2101

IS - 4

M1 - 120604JVA

ER -

Layer structure of ultrathin Ag films on Ni/Pt(111)

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