Structural stability of an icosahedral Cd-Yb quasicrystal and its crystalline approximant under high pressure

T. Watanuki, T. J. Sato, A. P. Tsai

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Synchrotron x-ray powder diffraction studies on an icosahedral Cd-Yb quasicrystal (iCd-Yb), its crystalline approximant of Cd6Yb (cCd-Yb) and the related Cd25Eu4 (cCd-Eu) material were performed under pressures of up to about 40 GPa at room temperature. The icosahedral lattice of the atomic cluster in iCd-Yb and the bcc lattices in cCd-Yb and cCd-Eu were found to be stable under pressure. Although the Tsai-type atomic cluster can possibly be distorted in various ways, low-symmetry distortion modes do not seem to develop even at high pressure. It is considered that the cluster structure of centrosymmetric dense atomic packing prevented low-symmetry distortions and consequently provided the cluster lattice stability. The bulk moduli were also determined to be B0(iCd-Yb) 49.2(3) GPa, B 0(cCd-Yb) 46.1(7) GPa and B0(cCd-Eu) 49.6(3) GPa, which were much lower than the typical reported values for other quasicrystalline alloys.

本文言語English
論文番号012019
ジャーナルJournal of Physics: Conference Series
215
DOI
出版ステータスPublished - 2010
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「Structural stability of an icosahedral Cd-Yb quasicrystal and its crystalline approximant under high pressure」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル