Step-induced structural modification of Co thin films deposited on Au(233) vicinal surface

We report on a step-induced morphological modification in Cobalt thin films (from 5 to 90 monolayers (ML)) oil Au(1 1 1) substrates studied by grazing incidence X-ray diffraction (GIXD). When the cobalt film is deposited on the highly stepped Au(2 3 3) substrate its structure is found to be mainly f...

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Bibliographic Details
Published in:Surface science 2004, Vol.557 (1-3), p.171-182
Main Authors: Baudot, G, Girard, Y, Repain, V, Rohart, S, Rousset, S, Kreckelbergh, S, Coati, A, Garreau, Y
Format: Article
Language:English
Subjects:
Physics
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Summary:We report on a step-induced morphological modification in Cobalt thin films (from 5 to 90 monolayers (ML)) oil Au(1 1 1) substrates studied by grazing incidence X-ray diffraction (GIXD). When the cobalt film is deposited on the highly stepped Au(2 3 3) substrate its structure is found to be mainly face centered cubic (FCC) whereas its natural bulk structure is hexagonal close-packed (HCP). Relaxation and stacking fault probability have been determined using a simple diffraction model which fits all the GIXD data. A vicinal Co interface including this stacking fault probability and a small rotation of the Co(1 1 1) planes with respect to the Au(1 1 1) planes is proposed which is in exact registry with the Au vicinal surface. (C) 2004 Elsevier B.V. All rights reserved.
ISSN:0039-6028
1879-2758