Direct Observation of Atomic Arrangement of High-T_c Superconductor YBa_2Cu_3O_<6.74> by High-Resolution Electron Microscopy
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概要
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The crystal structure of YBa_2Cu_3O_<6.74> superconducting oxide with a transition temperature higher than liquid nitrogen temperature has been studied by high-resolution electron microscopy. The observed high-resolution micrograph is consistent with the oxygen-deficient perovskite structure model proposed in previous work with neutron and X-ray diffraction. In the image, Y, Ba and Cu atoms are represented as dark spots with different contrast depending on their atomic numbers. Unoccupied oxygen atom positions are distinguished from occupied oxygen atom positions as brighter regions.
- 1987-07-20
著者
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Kikuchi Masae
Institute For Material Research Tohoku University
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Syono Yasuhiko
Institute For Materials Research Tohoku University
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OH-ISHI Katsuyoshi
Institute for Materials Research, Tohoku University
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Hiraga Kenji
Institute For Materials Research
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Oh-ishi Katsuyoshi
Institute For Materials Research Tohoku University
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Hirabayashi Makoto
Institute For Materials Reseach Tohoku University
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Shindo Daisuke
Institiute For Advanced Materials Processing Tohoku University
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SYONO Yasuhiko
Institute for Materials Research, Tohoku University
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SHINDO Daisuke
Institute for Materials Research, Tohoku University
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Kikuchi Masae
Institute for Iron, Steel and Other Metals, Tohoku University
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