Structure and composition of cleaved and heat-treated tenfold surfaces of decagonal Al-Ni-Co quasicrystals

被引：9

作者：

Ebert, P ^{[1
]}

Kluge, F ^{[1
]}

Yurechko, M ^{[1
]}

Grushko, B ^{[1
]}

Urban, K ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

SURFACE SCIENCE | 2003年 / 523卷 / 03期

关键词：

aluminum; nickel; cobalt; clusters; scanning tunneling microscopy; auger electron spectroscopy; scanning electron microscopy (SEM);

D O I：

10.1016/S0039-6028(02)02462-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigated cleavage surfaces perpendicular to the tenfold direction of as-grown decagonal Al-Ni-Co quasi-crystals by scanning tunneling microscopy, Auger electron spectroscopy, and scanning electron microscopy. The cleavage surface is determined by a cluster-subcluster structure. The image contrast of the smallest features, 1-2 nm in diameter, is related to the columnar atom arrangements extending perpendicular to the cleavage plane, which are predicted by current models of the decagonal quasicrystal structure. No voltage dependence of the STM images is observed. The presence of surface states and an enhanced density of states are discussed. Heat-treatments of the cleaved Al-Ni-Co quasicrystal surfaces show nearly no changes in chemical composition and structure up to about 750 degreesC. This is correlated with a much lower concentration of vacancies in as-grown decagonal Al-Ni-Co quasicrystals as compared to that in as-grown icosahedral Al-Pd-Mn quasicrystals. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：298 / 306

页数：9

共 36 条

[1] X-ray diffraction study of decaprismatic Al-Co-Ni crystals as a function of composition and temperature [J].

Baumgarte, A ;

Schreuer, J ;

Estermann, MA ;

Steurer, W .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1997, 75 (06) :1665-1675

[2] NEUTRON AND X-RAY SINGLE-CRYSTAL STUDY OF THE ALPDMN ICOSAHEDRAL PHASE [J].

BOUDARD, M ;

DEBOISSIEU, M ;

JANOT, C ;

HEGER, G ;

BEELI, C ;

NISSEN, HU ;

VINCENT, H ;

IBBERSON, R ;

AUDIER, M ;

DUBOIS, JM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1992, 4 (50) :10149-10168

[3] STRUCTURE MODEL OF THE AL-CU-CO DECAGONAL QUASI-CRYSTAL [J].

BURKOV, SE .

PHYSICAL REVIEW LETTERS, 1991, 67 (05) :614-617

[4] Structure solution of the basic decagonal Al-Co-Ni phase by the atomic surfaces modelling method [J].

Cervellino, A ;

Haibach, T ;

Steurer, W .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 2002, 58 :8-33

[5]

Davis L. E, 1976, HDB AUGER ELECT SPEC

[6] Surface structures of cleaved icosahedral Al-Pd-Mn single quasicrystals after heat treatment [J].

Ebert, P ;

Yue, F ;

Urban, K .

PHYSICAL REVIEW B, 1998, 57 (05) :2821-2825

[7] Evidence for a cluster-based structure of AlPdMn single quasicrystals [J].

Ebert, P ;

Feuerbacher, M ;

Tamura, N ;

Wollgarten, M ;

Urban, K .

PHYSICAL REVIEW LETTERS, 1996, 77 (18) :3827-3830

[8] Evolution of the composition and structure of cleaved and heat-treated icosahedral Al-Pd-Mn quasicrystal surfaces [J].

Ebert, P ;

Kluge, F ;

Grushko, B ;

Urban, K .

PHYSICAL REVIEW B, 1999, 60 (02) :874-880

[9]

EBERT P, IN PRESS PHYS REV B, V67

[10] Plastic deformation of decagonal Al-Ni-Co quasicrystals [J].

Feuerbacher, M ;

Bartsch, M ;

Grushko, B ;

Messerschmidt, U ;

Urban, K .

PHILOSOPHICAL MAGAZINE LETTERS, 1997, 76 (06) :369-375

← 1 2 3 4 →