島根医科大学紀要

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島根医科大学紀要 11
1988-12-01 発行

Characterization of Bi-Doped High-Tc Superconductor SmBa_2Cu_3O_y by X-Ray Diffraction

田口 功
浅井 正俊
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内容記述(抄録等)
Bismuth has been successfully introduced into the Sm-Ba-Cu-O system. X-ray powder diffraction patterns show that Sm_<1-x>Bi_xBa_2Cu_3O_y samples with x=0.1, 0.2, which were prepared by sintering, consist of two phases: the main phase has the orthorhombic perovskite-like structure reported for the high-Tc superconductor YBa_2Cu_3O_<7-δ> and the impurity phase is identified with BaCuO_2. It is found that the x-dependences of the lattice parameters are very similar to those for Sm_<1+x>Ba_<2-x>Cu_3O_<7-δ> or Eu_<1+x>Ba_<2-x>CO_<7-δ>. These results indicate that the Ba sites in the main phase are partly occupied by Bi^<3+> or Sm^<3+> ions.