Calculation of the electromigration wind force in al alloys

J. P. Dekker, P. Gumbsch, E. Arzt, A. Lodder

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    The electromigration wind force in various Al alloys is calculated using a Green’s-function method for the calculation of the electronic structure. The influence of the environment of the jumping atoms is studied in detail in the Al-Cu alloy. Alloys of Al with (Formula presented) and (Formula presented) alloying elements are studied systematically in order to investigate the relation between the electronic states of the alloying atom and the wind force. The study also includes several other alloys, which have been used in the past in attempts to increase electromigration lifetime. It is shown that the wind force on an Al host atom can be changed considerably by the presence of an alloying atom at particular positions near the jump path. This could be an additional contribution to the well-known decelerating effect of some alloying elements on electromigration in Al.

    Original languageEnglish
    Pages (from-to)7451-7457
    Number of pages7
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume59
    Issue number11
    DOIs
    Publication statusPublished - 1 Jan 1999

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