Surface Alloy Formation by Interdiffusion across a Linear Interface
- 30 September 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 77 (14) , 2977-2980
- https://doi.org/10.1103/physrevlett.77.2977
Abstract
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.Keywords
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