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

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

Research output: Contribution to journalArticle

10 Citations (Scopus)

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

Fingerprint

Critical currents
hypoxia
Powders
critical current
Critical current density (superconductivity)
Oxygen
Flux pinning
flux pinning
Precipitates
precipitates
current density
curves
barium copper yttrium oxide

Keywords

  • critical current
  • flux pinning
  • irreversibility line

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Influence of oxygen deficiency on the critical current properties of MPMG-processed YBa2Cu3O7-δ. / Nakamura, N.; Murakami, Masato; Fujimoto, H.; Koshizuka, N.

In: Cryogenics, Vol. 32, No. 11, 1992, p. 949-953.

Research output: Contribution to journalArticle

Nakamura, N. ; Murakami, Masato ; Fujimoto, H. ; Koshizuka, N. / Influence of oxygen deficiency on the critical current properties of MPMG-processed YBa2Cu3O7-δ. In: Cryogenics. 1992 ; Vol. 32, No. 11. pp. 949-953.
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