Characteristic chemical shifts of quasicrystalline Zn-Mg-Zr alloys studied by EELS and SXES

S. Koshiya, M. Terauchi, S. Ohhashi, A. P. Tsai

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    Chemical shifts of the constituent atoms of primitive icosahedral quasicrystal (P-QC), face-centred icosahedral quasicrystal (F-QC) and 1/1-approximant (1/1-AP) of F-QC Zn-Mg-Zr alloys were investigated for the first time using high energy-resolution electron energy-loss spectroscopy (EELS) and soft-X-ray emission spectroscopy (SXES). Among Zn M-shell and Mg L-shell excitation EELS spectra of P-QC, F-QC and 1/1-AP alloys, only the quasicrystalline alloys showed a chemical shift towards the larger binding energy side. In Zn-L and Zr-L emission SXES spectra, the P-QC and F-QC alloys showed a chemical shift towards larger binding energy side. The magnitudes of the shifts in the Zn-L emission spectra of the quasicrystalline alloys were almost the same as for ZnO. These results strongly suggest a decrease in valence charge in quasicrystalline states. Therefore, it should be concluded that bonding in quasicrystalline states involves a characteristic increase in covalency compared with bonding in corresponding approximant and standard metal crystals.

    Original languageEnglish
    Pages (from-to)2250-2258
    Number of pages9
    JournalPhilosophical Magazine
    Volume93
    Issue number18
    DOIs
    Publication statusPublished - 2013 Jun 1

    Keywords

    • Zn-Mg-Zr alloy
    • chemical shift
    • electronic structure
    • quasicrystalline alloy
    • spectroscopy

    ASJC Scopus subject areas

    • Condensed Matter Physics

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