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

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

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

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
Volume351
Issue number4
DOIs
Publication statusPublished - 2001 Apr 15

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homogenizing
Annealing
annealing
atmospheres
Oxygenation
oxygenation
Superconducting transition temperature
sintering
Sintering
transition temperature
retarding
barium copper yttrium oxide

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Lowered Tc of YBa2(Cu,Zn)3O7-δ by homogenizing procedure and annealing treatments. / Adachi, S.; Kasai, C.; Tajima, S.; Tanabe, K.; Fujihara, Shinobu; Kimura, T.

In: Physica C: Superconductivity and its Applications, Vol. 351, No. 4, 15.04.2001, p. 323-328.

Research output: Contribution to journalArticle

Adachi, S. ; Kasai, C. ; Tajima, S. ; Tanabe, K. ; Fujihara, Shinobu ; Kimura, T. / Lowered Tc of YBa2(Cu,Zn)3O7-δ by homogenizing procedure and annealing treatments. In: Physica C: Superconductivity and its Applications. 2001 ; Vol. 351, No. 4. pp. 323-328.
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AU - Kasai, C.

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AU - Fujihara, Shinobu

AU - Kimura, T.

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