Chin. Phys. Lett.  2001, Vol. 18 Issue (1): 88-90    DOI:
Original Articles |
Preliminary Characterization of Loop-Shaped Defect in the AlPdMn Icosahedral Quasicrystal by Conventional X-Ray Topography
WANG Jian-Bo 1,2;J. GASTALDI2;WANG Ren-Hui 1
1Department of Physics, Wuhan Univers 430072 2CRMC2-CNRS, Campus de Luminy, case 913, F-13288 Marseille Cedex 09, France
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WANG Jian-Bo, J. GASTALDI, WANG Ren-Hui 2001 Chin. Phys. Lett. 18 88-90
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Abstract Loop-shaped contrasts were observed in the as-grown Al70.3Pd20.6Mn9.1 icosahedral quasicrystal (IQC) by means of x-ray diffraction topography (Lang's method). One possible direction of the apparent Burger vectors of loop-shaped defects (LSDs) was determined to be B = [1ī0ī01] by the invisibility criterion, whose physical component is parallel to the two-fold axis 1/τ[ī/0, 1/1, 0/ī] of the IQC. Apart from the relaxation of strain fields around the faceted dodecahedral holes and lamellar precipitates, LSDs may well originate from the growth of the quasicrystal, which shows that these defects could be a kind of intrinsic defect in the quasicrystals.
Keywords: 61.72.Ef      61.72.Dd      61.44.Br     
Published: 01 January 2001
PACS:  61.72.Ef  
  61.72.Dd (Experimental determination of defects by diffraction and scattering)  
  61.44.Br (Quasicrystals)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2001/V18/I1/088
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