FORMATION OF NI(100)-AL SURFACE ALLOY

Citation
Dj. Oconnor et al., FORMATION OF NI(100)-AL SURFACE ALLOY, Surface science, 358(1-3), 1996, pp. 202-207
Citations number
12
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
00396028
Volume
358
Issue
1-3
Year of publication
1996
Pages
202 - 207
Database
ISI
SICI code
0039-6028(1996)358:1-3<202:FONSA>2.0.ZU;2-I
Abstract
Early studies of the growth of Ni3Al(100) on a Ni(100) surface reporte d that an alloy extending to some depth was formed, In a series of stu dies undertaken using Low and Medium Energy Ion Scattering it has been found that there is evidence for the formation of a surface alloy ext ending to a depth of 2 to 3 atomic layers. A stable c-(2 x 2) structur e was observed which, from MEIS measurements it was determined that 0. 5 ML Al was incorporated into the first three atomic layers. From LEIS it, was possible to confirm that the Al did not form an overlayer and that the surface atomic layer comprised 50% Al. There was less than 5 % Al observed on the second layer which is consistent with Ni3Al(100) termination.