DISTRIBUTION OF NONEQUIVALENT ALUMINUM SITES REVEALED IN AL-CU-RU AND AL-CU-FE QUASI-CRYSTALS BY AL-27 NQR

被引：13
|
作者：
SHASTRI, A
BORSA, F
TORGESON, DR
GOLDMAN, AI
机构：
[1] UNIV PAVIA,DIPARTIMENTO FIS,I-27100 PAVIA,ITALY
[2] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011
来源：
PHYSICAL REVIEW B | 1994年 / 50卷 / 06期
关键词：
D O I：
10.1103/PhysRevB.50.4224
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The distribution of nonequivalent aluminum sites was studied in Al-Cu-Fe and Al-Cu-Ru stable icosahedral quasicrystalline phases using Al-27 NQR spectra taken at 4.2 K. The observed spectra-which give directly the distribution of nonequivalent aluminum sites-were broad, asymmetric, and structureless. A simple electric-field-gradient model calculation accounted for the spectral width in terms of a wide distribution of local atomic environments, and an estimate for the lower limit on the number of nonequivalent aluminum sites was found.
引用
收藏
页码：4224 / 4227
页数：4
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