Dynamics in the melt of an icosahedral Al72Pd 20Mn8 quasicrystal

J. T. Okada, M. Inui, D. Ishikawa, A. Q.R. Baron, K. Matsuda, S. Tsutsui, Y. Watanabe, S. Nanao, T. Ishikawa

研究成果: Article査読

7 被引用数 (Scopus)

抄録

The dynamic structure factor S(Q,ω) of the melt of an icosahedral quasicrystal, Al72Pd20Mn8, was measured at 1223K near the melting point, Tm ≤ 1140K, for momentum transfers, Q, from 1.5 to 27.15nm-1 by means of an inelastic x-ray scattering technique using synchrotron radiation at SPring-8. The composition of Al 72Pd20Mn8 is a special one in AlPdMn ternary alloys, since an icosahedral AlPdMn quasicrystal is formed from the melt. The acoustic mode was observed in the low-Q region, and a substantial broadening of the longitudinal current-current correlation function and the crossover of the effective sound velocity from hydrodynamic to viscoelastic regions were observed around 6nm-1, which hints at the existence of a cluster with a size of about 1nm in the melt.

本文言語English
論文番号L03
ページ(範囲)L613-L618
ジャーナルJournal of Physics Condensed Matter
18
49
DOI
出版ステータスPublished - 2006 12月 13
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学

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