| Autor: |
S. J. Poon, K. R. Lawless, A. J. Drehman |
| Rok vydání: |
1985 |
| Předmět: |
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| Zdroj: |
Physical Review Letters. 55:2324-2327 |
| ISSN: |
0031-9007 |
| DOI: |
10.1103/physrevlett.55.2324 |
| Popis: |
We observe for the first time the transformation of glassy alloys (${\mathrm{Pd}}_{100\ensuremath{-}x\ensuremath{-}y}{\mathrm{U}}_{x}{\mathrm{Si}}_{y}$, $x\ensuremath{\simeq}y\ensuremath{\simeq}20$ at.%) into a metastable icosahedral phase with quasicrystalline order upon annealing. The icosahedral symmetry of the latter phase is confirmed by x-ray and electron diffraction. This phase can be formed only within a very narrow compositional range ( 2 at.%) of U and Si, suggestive of a strong chemical ordering in it. The icosahedral and glassy phases have similar electrical transport properties. However, magnetic-susceptibility results indicate that the electronic structure of the icosahedral phase is very different from its glassy and crystalline (U${\mathrm{Pd}}_{3}$) counterparts. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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