title: Evaluation of the local environment for nanoscale quasicrystal formation in Zr(80)Pt(20) glassy alloy using Voronoi analysis.
abstract: The local atomic structure of nano-quasicrystal-forming Zr(80)Pt(20) binary glassy alloy was investigated by reverse Monte Carlo modeling based on the results of x-ray diffraction. A prepeak at Q∼17 nm(-1) originating from the unique bonding between the Pt-Pt pair is observed in the structure factor. Voronoi analysis indicates that an icosahedral-like polyhedron is formed around Pt. It is also found that icosahedral-like polyhedra exist around Zr; however, the fraction of perfect icosahedra is considerably lower than that in the nano-quasicrystalforming Zr(70)Pd(30) glassy alloy. A difference in the local environment between the two binary quasicrystal-forming glassy alloys is suggested.
authors.affiliation: Center for Interdisciplinary Research, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Saida
authors.forename: Keiji
authors.initials: K
authors.lastname: Itoh
authors.forename: Shigeo
authors.initials: S
authors.lastname: Sato
authors.forename: Muneyuki
authors.initials: M
authors.lastname: Imafuku
authors.forename: Takashi
authors.initials: T
authors.lastname: Sanada
authors.forename: Akihisa
authors.initials: A
authors.lastname: Inoue