A nuclear magnetic resonance study of decagonal and related crystalline phases in Al-Cu-Co system

T. Shinohara, Ampo Sai, A. Inoue, T. Masumoto

Research output: Contribution to journalArticlepeer-review

Abstract

We have measured 27Al, 65Cu and 59Co spin-echo spectra for Al70CuXCo30-X(X=6, 12, 15) Al73Co27 and Al76.5Co23.5 decagonal quasicrystals and for Al76.5Co23.5 monoclinic compound. The line shape and peak shift suggest different local atomic configuration in these phases. It seems that the Al atoms make a quasicrystalline skeleton in the decagonal phase, and the Co atoms also enter symmetric sites three dimensionally. On the other hand, the Cu atoms occupy asymmetric sites characteristic of the decagonal phase. For the Al76.5Co23.5 monoclinic compound, the Al atoms occupy the one crystallographic site but the Co atoms occupy three different sites whereas the decagonal phase has a less metallic Co atom among those sites.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalScience Reports of the Rerearch Institutes Tohoku University Series A-Physics
Volume42
Issue number1
Publication statusPublished - 1996 Mar 1

Keywords

  • Aluminum-copper-cobalt
  • Decagonal quasicrystal
  • Monoclinic structure
  • Nuclear magnetic resonance

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys

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