A large columnar cluster of atoms in an Al-Cu-Rh decagonal quasicrystal studied by atomic-scale electron microscopy observations

Authors
Hiraga, K Ohsuna, T Park, KT
Citation
K. Hiraga et al., A large columnar cluster of atoms in an Al-Cu-Rh decagonal quasicrystal studied by atomic-scale electron microscopy observations, PHIL MAG L, 81(2), 2001, pp. 117-122
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHILOSOPHICAL MAGAZINE LETTERS
ISSN journal
09500839 → ACNP
Volume
81
Issue
2
Year of publication
2001
Pages
117 - 122
Database
ISI
SICI code
0950-0839(200102)81:2<117:ALCCOA>2.0.ZU;2-5
Abstract
We have found a columnar atomic cluster with a decagonal section of about 3 .2 nm in diameter as a structural unit of an Al-Cu-Rh decagonal quasicrysta l with 0.4 nm periodicity, using atomic-scale observations of high-resoluti on transmission electron microscopy (HRTEM) and high-angle annular detector dark-field (HAADF) scanning transmission electron microscopy (STEM). The d ecagonal cluster is tau times (tau is the golden ratio) the largest cluster (2.0 nm in diameter) previously found in Al-Ni-Co and Al-Pd-Mn decagonal q uasicrystals. A structural model of the cluster is proposed from HRTEM and HAADF STEM images.