Long Period Superstructures with Hexagonal Symmetry in the Cu-Sb Alloys near 20 at.%Sb
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概要
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Crystal structures of two hexagonal phases in Cu-Sb alloys have been studied by means of X-ray and electron diffraction as well as electron microscopy. A new long period superstructure with space group P6_3/mmc is found in the range 16-19 at. % Sb (ε phase), which is essentially an anti-phase modulation derived from the hexagonal ordered structure of the Ni_3Sn (DO_<19>) type. The super-period of atomic order in the close packed plane is nearly seven times the nearest neighbor distance and decreases with increasing e/a. The image of the super-period is directly observed with an 1 MV electron microscope. A similar long period superstructure is established for the neighboring phase (ε') around 21 at. % Sb. The stabilization mechanism of the two superstructures is interpreted in terms of the interaction of the Fermi surface with the super-zone face.
- 社団法人日本物理学会の論文
- 1972-09-05
著者
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Yamaguchi Sadae
The Research Institute For Iron Steel And Other Metals
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Hirabayashi Makoto
The Research Institute For Iron Steel And Other Metals
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