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

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)361-364
Number of pages4
Journaljournal of the japan society of powder and powder metallurgy
Volume41
Issue number4
DOIs
Publication statusPublished - 1994 Feb 1

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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