Superconducting Properties of High <i>T</i><sub>c</sub> Ba<sub>2</sub>YCu<sub>3</sub>O<sub><i>x</i></sub> Prepared from Organic or Inorganic Acid Salts by Thermal Decomposition Techniques

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  • NASU Hiroyuki
    Department of Electrical Engineering, Faculty of Engineering, Hiroshima University
  • MAKIDA Seigo
    Department of Electrical Engineering, Faculty of Engineering, Hiroshima University
  • IBARA Yoshikazu
    Department of Electrical Engineering, Faculty of Engineering, Hiroshima University
  • KATO Takeshi
    Department of Electrical Engineering, Faculty of Engineering, Hiroshima University
  • IMURA Takeshi
    Department of Electrical Engineering, Faculty of Engineering, Hiroshima University
  • OSAKA Yukio
    Department of Electrical Engineering, Faculty of Engineering, Hiroshima University
  • OKANO Kazuyuki
    Research and Development Laboratory, Matsushita Electronic Components Co., Ltd.
  • HASEGAWA Yo
    Research and Development Laboratory, Matsushita Electronic Components Co., Ltd.

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Other Title
  • 有機又は無機酸塩の熱分解法による高温超伝導Ba<sub>2</sub>YCu<sub>3</sub>O<sub><i>x</i></sub>の超伝導特性
  • ユウキ マタハ ムキサンエン ノ ネツ ブンカイホウ ニ ヨル コウオン チョ

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For the detailed investigation of the effects of the starting materials and oxygen atmosphere in annealing, the temperature dependence of dc resistance, Meissner effect, and the X-ray diffraction patterns are measured for sintered body of Ba2YCu3Ox prepared by the thermal decomposition method of organic or inorganic acid salts. Consequently, it was found that the values of Tc were very sensitive with both factors, whereas diamagnetic behaviors at liquid nitrogen temperature were not. These results imply the excess amount of oxygen is necessary to obtain continuous superconducting phase in the thermal decomposition process of organic acid salts.

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