Time scales and atomic species in the phason dynamics of AlCuFe quasicrystals

被引：29

作者：

Coddens, G ^{[1
]}

Lyonnard, S ^{[1
]}

Calvayrac, Y ^{[1
]}

机构：

[1] CNRS,CTR ETUD CHIM MET,F-94407 VITRY SUR SEINE,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.78.4209

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present time-of-flight quasielastic neutron scattering data with isotopic contrast on phason hopping in perfect icosahedral Al62Cu25.5Fe12.5 quasicrystal powder samples. In total one Fe jump on the time scale li/2.0 +/- 0.5 mu eV, two Cu jumps (li/55 and li/253 mu eV), and a collective jump phenomenon [li/(900 +/- 200 mu eV)] involving all atomic species have now been identified. We also explain the unusual temperature dependence of the phason dynamics that has been universally observed in the past.

引用

页码：4209 / 4212

页数：4

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