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Bulk‐to‐surface segregation measurements of Sb in Cu(111)(0.08 at.%)Sb and Cu(110)(0.08 at.%)Sb single crystals
Author(s) -
Terblans J. J.,
van Wyk G. N.
Publication year - 2004
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1804
Subject(s) - activation energy , auger electron spectroscopy , antimony , kinetic energy , vacancy defect , chemistry , single crystal , analytical chemistry (journal) , auger , crystallography , kinetics , crystal (programming language) , frequency factor , materials science , atomic physics , inorganic chemistry , physics , chromatography , quantum mechanics , computer science , nuclear physics , programming language
Using Auger electron spectroscopy and the linear temperature ramping technique, the bulk‐to‐surface segregation kinetics of Cu(111)(0.08 at.%)Sb and Cu(110)(0.08 at.%)Sb were measured. From these kinetic measurements the pre‐exponential factor ( D 0 ) and the activation energy ( Q ) were determined and it was clear that the activation energy ( Q (111) ) for the Cu(111) crystal was 18% higher than the activation energy ( Q (110) ) for the Cu(110) crystal. These differences in the activation energies are explained in terms of the vacancy formation energy and its dependency on the surface energy. Copyright © 2004 John Wiley & Sons, Ltd.