Observation of Substitutional Site Preference in a Quasicrystal and Implication on Local Structure

Author Info

M. Eibschütz, AT&T Bell Laboratories
M. E. Lines, AT&T Bell Laboratories
H. S. Chen, AT&T Bell Laboratories
J. V. Waszczak, AT&T Bell Laboratories
G. C. Papaefthymiou, Massachusetts Institute of Technology
Richard B. Frankel, Massachusetts Institute of TechnologyFollow

Recommended Citation

Published in Physical Review Letters, Volume 59, Issue 21, November 23, 1987, pages 2443-2446.

NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.

The definitive version is available at https://doi.org/10.1103/PhysRevLett.59.2443.

Abstract

A combination of magnetic susceptibility and Mössbauer measurements on quasicrystalline i-Al₇₄Mn_20-xFe_xSi₆ (0.02≤x≤7.5) establishes that Mn atoms in i-Al₇₄Mn₂₀Si₆ occupy two distinct classes of sites, and that Fe substitutes for only one of them. The two classes are distinguished by the possession or otherwise of a localized magnetic moment. The data are consistent with a structure of interconnecting Mackay icosahedra (MI) in which localized moments are possessed only by Mn atoms adjacent to "broken" MI connections. The implied connectivity of the resulting MI network is close to that anticipated for a packing of MI on a three-dimensional Penrose-tile lattice.

Disciplines

Physics

Copyright

1987 American Physical Society.

Publisher statement

This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society. The following article appeared in Physical Review Letters.