Synthesis of Ca-doped Y124 Superconductor by Polymerized Complex Method Followed by O2-HIP Technique and Discussion of Ca-site Selectivity in the Crystal Structure.

Masato Kakihana, Shigeru Nishio, Masatomo Yashima, Hiromasa Mazaki, Hiroshi Yasuoka, Masahiro Yoshimura, Pedro Berastegui

研究成果: Article査読

抄録

We report Ca-site selectivity in the crystal structure of Y124(YBazCu4O8) superconductor. We sucsessfiilly synthesized superconducting samples with nominal compositions of (Y1-xCax)Ba2Cu6O8 (series-A: x=0.0, 0.05, 0.1) and Y(Ba2-yCay)Cu4O8) (series-B: y=0.0, 0.05, 0.1) by polymerized complex method followed by O2-IIIP technique. Neutron powder diffraction measurement has shown excess impurities in propotion to Ca-content in series-B. An extension of A Tc(10-90%) was also observed in series-B by AC-magnetic susceptibility measurement It is suggested that the formation of these impurities in series-B originate from a discrepancy in idea] composion, that is, (Y1-xCax)Ba2Cu4O8 (seires-A). We conclude that Ca-atom preferentially substitutes Y-atom in the 124 structure for these reasons.

本文言語English
ページ(範囲)361-364
ページ数4
ジャーナルjournal of the japan society of powder and powder metallurgy
41
4
DOI
出版ステータスPublished - 1994 2 1
外部発表はい

ASJC Scopus subject areas

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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