Lowered Tc of YBa2(Cu,Zn)3O7-δ by homogenizing procedure and annealing treatments

S. Adachi, C. Kasai, S. Tajima, K. Tanabe, S. Fujihara, T. Kimura

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


The effects of the homogenizing procedure and annealing treatment on superconducting transition temperature, Tc, were investigated for Zn-substituted YBa2Cu3O7-δ. Samples of YBa2Cu3-xZnxO7-δ (x = 0.00, 0.02, 0.05 and 0.10) were prepared under different conditions. It was found that additional pulverization and re-sintering lower Tc in Zn-substituted samples. Moreover, annealing in reduced atmosphere prior to the final oxygenation further decreases Tc, resulting in the lowest value (Tc = 46 K for x = 0.10) among Tc's ever reported for Zn-substituted YBa2Cu3O7-δ. This suggests that Zn at the Cu-O chain site moves to the CuO2 plane by annealing samples in reduced atmosphere. Comparison of Tc-suppression effects by Zn and Ni is also discussed.

Original languageEnglish
Pages (from-to)323-328
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue number4
Publication statusPublished - 2001 Apr 15


  • Annealing
  • Homogeneity
  • Impurity effect
  • Iodometry
  • Substitution
  • T-suppression
  • YBaCuO
  • Zn-doping

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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