Epitaxial film growth of Au-Al alloy on a quasiperiodic surface of icosahedral Al72Pd19.5Mn8.5

Masahiko Shimoda, Jun Qing Guo, Taku J. Sato, An Pang Tsai

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We have found that an epitaxial film of Au-Al alloy can be formed on a quasiperiodic surface of icosahedral Al72Pd19.5Mn8.5. Depositions of Au onto the quasiperiodic surface, which is perpendicular to one of the fivefold axes of Al72Pd19.5Mn8.5. were attempted in order to create a quasicrystal of a single element as an epitaxial film. Although the desired film was not obtained on the clean surface, an ordered layer of Au-Al alloy with icosahedral symmetry was formed in the presence of predeposited In, which worked as a surfactant. X-ray photoelectron diffraction (XPD) images for Au 4f and Al 2s emissions from the ordered layer indicate clear fivefold symmetric patterns which are coherent with the symmetry of the substrate. In addition, symmetric elements specific to the icosahedral symmetry are clearly recognized in these patterns, indicating that both Au and Al atoms are located in an icosahedral environment with long-range bond-orientational order.

Original languageEnglish
Pages (from-to)6073-6076
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume40
Issue number10
Publication statusPublished - 2001 Oct 1
Externally publishedYes

Keywords

  • Epitaxial film
  • Photoelectron diffraction
  • Quasicrystal
  • Surfactant

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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