Phase diagram of oxygen on Ni(100)

David E. Taylor; Robert L. Park

doi:10.1016/0039-6028(83)90568-X

Phase diagram of oxygen on Ni(100)

David E. Taylor^*, Robert L. Park

^*Corresponding author for this work

Physics and Astronomy

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42 Scopus citations

Abstract

We have studied the coverage-temperature phase diagram of chemisorbed oxygen on Ni(100) with LEED and AES. We find that the oxygen p(2 × 2) structure undergoes a nearly reversible order- disorder phase transition for coverages between 0.15 and 0.30 monolayer (T_c ≈ 560 K for θ = 0.25). For these coverages, it is also found that the chemisorbed oxygen begins dissolving into the bulk nickel as the overlayer disorders. A reversible order-disorder transition is not seen for the oxygen c(2 × 2) structure, but there is evidence that bulk dissolution here also occurs coincident with the overlayer disordering.

Original language	English (US)
Pages (from-to)	L73-L79
Journal	Surface Science
Volume	125
Issue number	2
DOIs	https://doi.org/10.1016/0039-6028(83)90568-X
State	Published - Feb 2 1983

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(83)90568-X

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title = "Phase diagram of oxygen on Ni(100)",

abstract = "We have studied the coverage-temperature phase diagram of chemisorbed oxygen on Ni(100) with LEED and AES. We find that the oxygen p(2 × 2) structure undergoes a nearly reversible order- disorder phase transition for coverages between 0.15 and 0.30 monolayer (Tc ≈ 560 K for θ = 0.25). For these coverages, it is also found that the chemisorbed oxygen begins dissolving into the bulk nickel as the overlayer disorders. A reversible order-disorder transition is not seen for the oxygen c(2 × 2) structure, but there is evidence that bulk dissolution here also occurs coincident with the overlayer disordering.",

author = "Taylor, {David E.} and Park, {Robert L.}",

note = "Funding Information: It is a pleasure to acknowledge A.R. Kortan and J.F. Morar for their advice and assistance.T his work supported by National Science Foundation Department of Materials Research grant 7900323.",

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T1 - Phase diagram of oxygen on Ni(100)

AU - Taylor, David E.

AU - Park, Robert L.

N1 - Funding Information: It is a pleasure to acknowledge A.R. Kortan and J.F. Morar for their advice and assistance.T his work supported by National Science Foundation Department of Materials Research grant 7900323.

PY - 1983/2/2

Y1 - 1983/2/2

N2 - We have studied the coverage-temperature phase diagram of chemisorbed oxygen on Ni(100) with LEED and AES. We find that the oxygen p(2 × 2) structure undergoes a nearly reversible order- disorder phase transition for coverages between 0.15 and 0.30 monolayer (Tc ≈ 560 K for θ = 0.25). For these coverages, it is also found that the chemisorbed oxygen begins dissolving into the bulk nickel as the overlayer disorders. A reversible order-disorder transition is not seen for the oxygen c(2 × 2) structure, but there is evidence that bulk dissolution here also occurs coincident with the overlayer disordering.

AB - We have studied the coverage-temperature phase diagram of chemisorbed oxygen on Ni(100) with LEED and AES. We find that the oxygen p(2 × 2) structure undergoes a nearly reversible order- disorder phase transition for coverages between 0.15 and 0.30 monolayer (Tc ≈ 560 K for θ = 0.25). For these coverages, it is also found that the chemisorbed oxygen begins dissolving into the bulk nickel as the overlayer disorders. A reversible order-disorder transition is not seen for the oxygen c(2 × 2) structure, but there is evidence that bulk dissolution here also occurs coincident with the overlayer disordering.

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U2 - 10.1016/0039-6028(83)90568-X

DO - 10.1016/0039-6028(83)90568-X

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VL - 125

SP - L73-L79

JO - Surface Science

JF - Surface Science

IS - 2

ER -

Phase diagram of oxygen on Ni(100)

Abstract

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