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Study of preferential sputtering and segregation effects on the surface composition of AlPdMn quasi‐crystals
Author(s) -
Samavat Feridoun,
Gladys Michael J.,
Jenks Cynthia J.,
Lograsso Thomas A.,
King Bruce V.,
O'Connor D. John
Publication year - 2008
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.2769
Subject(s) - sputtering , annealing (glass) , analytical chemistry (journal) , chemistry , ion , crystallography , materials science , thin film , metallurgy , nanotechnology , organic chemistry , chromatography
Using 2 keV He + and Ne + low‐energy ion scattering (LEIS), it was found that the Al/Pd concentration ratio at the surface of a nominally Al 69.9 Pd 20.5 Mn 9.6 quasi‐crystal decreases to a steady‐state value under bombardment as a result of preferential sputtering. Sputtering of an annealed surface results in a significant increase in Mn concentration on the surface which remained at annealing temperatures below 575 K. Variations of the Mn/Pd and Al/Pd ratios have been measured by LEIS as a function of temperature in the range 295–975 K for clean‐annealed and sputtered surfaces. The results show that Al/Pd ratio does not significantly change from 295 to 575 K for both He + and Ne + but increases with sample temperatures up to 875 K. Copyright © 2008 John Wiley & Sons, Ltd.