TY - JOUR
T1 - Structural disorder of the atom cluster in a highly-ordered decagonal quasicrystal of Al72Ni20Co8
AU - Saitoh, K.
AU - Tanaka, N.
AU - Tsai, A. P.
AU - Ishizuka, K.
N1 - Funding Information:
The authors are thankful to Dr. M. Haider and his colleagues of CEOS GmbH for technical support. The present study is partially supported by special coordination grants of ‘‘Active nano characterization’’ and ‘‘Nano-CMOS’’, grants-in-aid for scientific research (A) as ‘‘Fluctuation of structures and electronic states’’ (no. 17201022). One of the authors (A.P. Tsai) is grateful for the support by Core Research for Evolutional Science and Technology of Japan Science and Technology Corporation.
PY - 2007/7
Y1 - 2007/7
N2 - Spherical-aberration-corrected high-resolution transmission electron microscopy observation has been carried out for a highly ordered decagonal quasicrystal of water-quenched Al72Ni20Co8. Atom clusters with a 2 nm diameter, which are considered to be basic structural motifs of the present alloy, show triangular shaped atomic arrangements in the central part, as observed previously by high-angle annular dark-field scanning transmission electron microscopy. The triangular arrangement is not identical for all the atom clusters but varies from cluster to cluster, although the orientational order of the triangles agrees well with the quasiperiodic order. The present results indicate that decagonal Al72Ni20Co8 with a highly perfect quasiperiodic order contains a relatively large amount of structural disorder inside the atom cluster, which may be caused by a local relaxation to form the highly-ordered quasiperiodic arrangement of the atom-cluster.
AB - Spherical-aberration-corrected high-resolution transmission electron microscopy observation has been carried out for a highly ordered decagonal quasicrystal of water-quenched Al72Ni20Co8. Atom clusters with a 2 nm diameter, which are considered to be basic structural motifs of the present alloy, show triangular shaped atomic arrangements in the central part, as observed previously by high-angle annular dark-field scanning transmission electron microscopy. The triangular arrangement is not identical for all the atom clusters but varies from cluster to cluster, although the orientational order of the triangles agrees well with the quasiperiodic order. The present results indicate that decagonal Al72Ni20Co8 with a highly perfect quasiperiodic order contains a relatively large amount of structural disorder inside the atom cluster, which may be caused by a local relaxation to form the highly-ordered quasiperiodic arrangement of the atom-cluster.
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U2 - 10.1080/14786430701358665
DO - 10.1080/14786430701358665
M3 - Article
AN - SCOPUS:34547289955
VL - 87
SP - 2733
EP - 2739
JO - Philosophical Magazine
JF - Philosophical Magazine
SN - 1478-6435
IS - 18-21
ER -