Phys. Rev. Lett. 99, 095501 (2007) [4 pages]Correlation of Atomic Cluster Symmetry and Glass-Forming Ability of Metallic GlassReceived 20 April 2007; published 29 August 2007 Local structures play a crucial role in glass formation and properties. In addition to topological short-range order, the geometric property of site symmetry is another important but less known characteristic of local structures. It is shown that the observed sharp increase of glass forming ability of Ce70-xAl10Cu20Cox upon Co addition is correlated with a dramatic increase of Al site symmetry, as reflected by decreasing quadrupole frequency measured by 27Al NMR. The result is consistent with the structure model of Al-centered icosahedral clusters as the predominant structural building blocks. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.095501
DOI:
10.1103/PhysRevLett.99.095501
PACS:
61.18.Fs, 61.43.Fs, 76.60.−k
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