Influence of oxygen deficiency on the critical current properties of MPMG-processed YBa2Cu3O7-δ

N. Nakamura, Masato Murakami, H. Fujimoto, N. Koshizuka

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Abstract

The critical current density and the irreversibility field for melt-powder-melt growth (MPMG)-processed YBa2Cu3O7-δ samples are determined magnetically in fields parallel to the c axis. Both Jc and Birr are depressed with increase of oxygen deficiency. Birr is not depressed appreciably with decrease of the concentration of Y2BaCuO5 precipitates in spite of a significant depression of Jc. A bump structure in the Jc(B) curve is observed and varies systematically with the oxygen deficiency. These results are compared to flux-pinning models.

Original languageEnglish
Pages (from-to)949-953
Number of pages5
JournalCryogenics
Volume32
Issue number11
DOIs
Publication statusPublished - 1992
Externally publishedYes

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Keywords

  • critical current
  • flux pinning
  • irreversibility line

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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