Initial growth mode of chromium on Cu(100) and Ag(100): a comparison

The initial growth mode of Cr on Cu(100) and Ag(100) surfaces is studied by photoemission methods. In particular photoemission is used as a titration method allowing one to determine the clean surface area left after Cr deposit. For Cu(100) it is found that at room temperature, or above, body center...

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Bibliographic Details
Published in:Surface science 1994-09, Vol.331-333, p.957-960
Main Authors: Rouyer, D, Krembel, C, Hanf, M C, Bolmont, D, Gewinner, G
Format: Article
Language:English
Online Access:Get full text
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Summary:The initial growth mode of Cr on Cu(100) and Ag(100) surfaces is studied by photoemission methods. In particular photoemission is used as a titration method allowing one to determine the clean surface area left after Cr deposit. For Cu(100) it is found that at room temperature, or above, body centered cubic (bcc) Cr grows initially in the form of bilayer or multilayer islands with (110) orientation and with 90% substrate coverage by approx4 monolayers. This contrasts with the growth mode observed on Ag(100) where, at moderate substrate temperatures (430-450K), only monolayer bcc Cr islands with (100) orientation are formed initially. This behavior is confirmed by Cr 2p core level photoemission measurements which indicate that in the monolayer range Cr is already in bulk-like environment on Cu(100) in contrast to Ag(100) where a flat monolayer with strongly enhanced magnetism is obtained.
ISSN:0039-6028