Relation of Oxygen Content and Modulation Structure in Bi2201 System
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概要
- 論文の詳細を見る
Two series of samples of Bi1.8Pb0.2Sr2CuO y and Bi1.9Sr1.6La0.4CuO y systems with different oxygen content were prepared. The microstructure of these samples was investigated by means of X-ray diffraction (XRD) and electron diffraction (ED). The analysis of XRD indicates that a progressive change in lattice parameters takes place with the removal of oxygen. The analysis of ED patterns reveals that for the Bi1.8Pb0.2Sr2CuO y system, the orthorhombic modulation (Pb-type modulation) is strongly related to the oxygen in Bi2O2 layers, which implies that the orthorhombic modulation is not compositional (Pb) modulation, and the periodic distribution of oxygen in Bi2O2 layers induced by Pb doping may be the real origin of orthorhombic modulation. While for the Bi1.9Sr1.6La0.4CuO y system, the monoclinic incommensurate modulation is independence of the variation of oxygen in Bi2O2 layers, which suggests that the intercalation or removal of extra oxygen atoms was only the result of the monoclinic modulation structure changing, and the crystal misfit between Bi2O2 layers and perovskite blocks was the real driving force of the Bi-concentrated band superstructural modulation.
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 1997-06-15
著者
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Zhiqiang Mao
Structure Research Laboratory University Of Science And Technology Of China
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Gaojie Xu
Structure Research Laboratory University Of Science And Technology Of China
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Guien Zhou
Structure Research Laboratory University Of Science And Technology Of China
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Mingliang Tian
Structure Research Laboratory University Of Science And Technology Of China
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RONGHU Wu
Structure Research Laboratory, University of Science and Technology of China
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Guien Zhou
Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
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Yuheng Zhang
Chinese Center of Advanced Science and Technology (World Laboratory), P.O.Box 8730, Beijing,
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Zhiqiang Mao
Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
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Ronghu Wu
Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
関連論文
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