Theoretical study of Ti and Fe surface alloys on Al(0 0 1) substrate

Daniel Spisak, Juergen Hafner

    Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

    Abstract

    Accurate density-functional calculations are performed to investigate the formation of Ti and Fe ultrathin alloys on Al(0 0 1) surface. It is demonstrated that a deposition of Ti monolayer on Al(0 0 1) substrate leads to the formation of Al3Ti surface alloy with Ti atoms arranged according to the L12 stacking, distinct from the D022 structure characteristic of a bulk Al3Ti compound. A quest for the reason of this distinct atomic arrangement led us to the study of the surface structure of Al3Ti(0 0 1) compound. It is concluded that even the Al3Ti(0 0 1) surface is terminated with three layers assuming a L12 stacking and hence this stacking fault can be classified as a surface-induced stacking fault. Several possibilities of Fe atoms distributed in the surface region of Al(0 0 1) have been examined. The most stable configuration is the one with the compact Fe monolayer on Al(0 0 1) and covered by one Al monolayer. Lastly, our calculations show that there is no barrier for the penetration of Fe adatoms below the Al(0 0 1) surface; however, such a barrier is present for a Ti-alloyed Al(0 0 1) surface. Œ 2005 Elsevier B.V. All rights reserved.
    OriginalspracheEnglisch
    Seiten (von - bis)5376-5378
    Seitenumfang3
    FachzeitschriftApplied Surface Science
    Jahrgang252
    Ausgabenummer15
    DOIs
    PublikationsstatusVeröffentlicht - 2006

    ÖFOS 2012

    • 1030 Physik, Astronomie

    Fingerprint

    Untersuchen Sie die Forschungsthemen von „Theoretical study of Ti and Fe surface alloys on Al(0 0 1) substrate“. Zusammen bilden sie einen einzigartigen Fingerprint.

    Zitationsweisen