Distribution of nonequivalent aluminum sites revealed in Al-Cu-Ru and Al-Cu-Fe quasicrystals by [sup 27]Al NQR

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.4224· OSTI ID:7168034

Shastri, A; Borsa, F; Torgeson, D R; Goldman, A I ^[1]

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1. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)

The distribution of nonequivalent aluminum sites was studied in Al-Cu-Fe and Al-Cu-Ru stable icosahedral quasicrystalline phases using [sup 27]Al NQR spectra taken at 4.2 K. The observed spectra---which give directly the distribution of nonequivalent aluminum sites---were broad, asymmetric, and structureless. A simple electric-field-gradient model calculation accounted for the spectral width in terms of a wide distribution of local atomic environments, and an estimate for the lower limit on the number of nonequivalent aluminum sites was found.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 7168034
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:6; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
ALUMINIUM 27
ALUMINIUM ALLOYS
ALUMINIUM ISOTOPES
COPPER ALLOYS
ELECTRIC FIELDS
IRON ALLOYS
ISOTOPES
LIGHT NUCLEI
NUCLEAR QUADRUPOLE RESONANCE
NUCLEI
ODD-EVEN NUCLEI
PLATINUM METAL ALLOYS
RESONANCE
RUTHENIUM ALLOYS
STABLE ISOTOPES
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TERNARY ALLOY SYSTEMS