Direct imaging of local chemical disorder and columnar vacancies in ideal decagonal al-ni-co quasicrystals

Yanfa Yan, Stephen J. Pennycook, An Pang Tsai

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)

Abstract

Atomic-resolution Z-contrast images provide direct images of chemical disorder and columnar vacancies in an ideal Al-Ni-Co decagonal quasicrystal. Chemical disorder occurs in the central ring of the 2 nm clusters and involves both Al and Ni(Co) atoms. Columnar vacancies are observed in the form of closely spaced, half-occupied atomic columns in specific rings within the clusters. This structure, derived from real space images, differs significantly from previous atomic models.

Original languageEnglish
Pages (from-to)5145-5148
Number of pages4
JournalPhysical review letters
Volume81
Issue number23
DOIs
Publication statusPublished - 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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