Chemically driven phason disorder in icosahedral Al-Pd-Mn alloys

A. P. Tsai, H. S. Chen, A. Inoue, T. Masumoto

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    21 Citations (Scopus)


    A very strong composition dependence of linewidths and chemical order is seen in rapidly quenched i-Al90-xPdxMn10 and i-Al70PdxMn30-x alloys. The i-Al70Pd20Mn10 exhibits a very small residual peak width, with a half width at half maximum of 2.5×10-3 Ai-1. The replacement of Pd with Al drastically increases the peak widths, in particular the dependence on the phason momentum, G, by 2 orders of magnitudes, while little line broadening is seen when Mn replaces Pd. Concurrent with the line broadening, the chemically ordered face-centered icosahedral structure in Al70Pd20Mn10 transforms to the simple structure of Al80Pd10Mn10.

    Original languageEnglish
    Pages (from-to)8782-8785
    Number of pages4
    JournalPhysical Review B
    Issue number10
    Publication statusPublished - 1991 Jan 1

    ASJC Scopus subject areas

    • Condensed Matter Physics


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