Dislocation configurations in highT
c oxide BiSrCaCuO |
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| Authors: | C Song F Liu H Gu T Lin J Zhang G Xiong D Yin |
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| Affiliation: | (1) TEM Laboratory, Department of Alloy Steels, Central Iron and Steel Research Institute, 100081 Beijing, People's Republic of China;(2) Department of Physics, Peking University, 100871 Beijing, People's Republic of China;(3) Center of Condensed Matter and Radiation CCAST World Laboratory, People's Republic of China |
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| Abstract: | A study of dislocation configurations in superconducting oxide BiSrCaCuO has been made by transmission electron microscopy. Evidence was found for the presence of dislocation pairs composed of two parallel single dislocations holding together with the same Burgers vectors. The pair can further dissociate into partials, giving rise to a four-fold ribbon. Networks consisting of dislocation pairs were also observed. These phenomena are attributed to the possible ordering of strontium and calcium ions and the existence of some oxygen sheet of the Aurivillius type in the oxide crystal. Schemes to illustrate the configurations are suggested and discussed. |
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