Affordable Access

Publisher Website

Interpretation of high electrical resistivity behavior based on the structure determination of the Al–Cu–(Fe,Ru)–Si 1/1-cubic approximants

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
342
Identifiers
DOI: 10.1016/s0925-8388(02)00268-2
Keywords
  • Rietveld Analysis
  • Electron Transport Properties
  • Quasicrystal
Disciplines
  • Chemistry

Abstract

Abstract The local atomic structure of Mackay icosahedral-type Al–Cu–(Fe,Ru)–Si 1/1-cubic approximants was determined by applying the Rietveld method to the powder diffraction spectra taken with synchrotron radiation. We found that these 1/1-cubic approximants involve chemical and structural disorders and that the difference in the magnitude of their electrical resistivities can be explained by taking into account the difference in the degree of chemical and structural disorder. The electrical resistivity of the Al 54Cu 25.5Ru 12.5Si 8 1/1-cubic approximant characterized by the possession of the strongest disorder is found to be the largest among the samples studied and to be comparable to that of the corresponding Al 63Cu 25Ru 12 quasicrystal. We conclude that the degree of disorder involved in the atomic arrangements plays a more crucial role than the quasi-periodicity in determining the magnitude of the electrical resistivity in both quasicrystals and their 1/1-cubic approximants.

There are no comments yet on this publication. Be the first to share your thoughts.