Surface Alloy Formation by Interdiffusion across a Linear Interface

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.2977· OSTI ID:385784

Schmid, A K; Hamilton, J C; Bartelt, N C; Hwang, R Q ^[1]

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1. Sandia National Laboratories, Livermore, California 94551-0969 (United States)

Interdiffusion profiles across a linear interface separating two metals that are miscible as monolayers [Co and Cu on a Ru(0001) surface] have been measured as a function of time. The interface remains sharp even after substantial intermixing, in dramatic contrast to bulk interdiffusion experiments between miscible metals. The unusual concentration profiles are explained by a combination of adatom surface diffusion and exchange of adatoms with atoms in the monolayer films. A simple Monte Carlo simulation of the adatom exchange mechanism quantitatively agrees with observations. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 385784
• Journal Information: Physical Review Letters, Vol. 77, Issue 14; Other Information: PBD: Sep 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT
DIFFUSION
COPPER
RUTHENIUM
MASS TRANSFER
METALLURGICAL EFFECTS
INTERFACES
ALLOYS
ADSORPTION
ANNEALING
ADATOMS