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

N. Nakamura; M. Murakami; H. Fujimoto; N. Koshizuka

doi:10.1016/0011-2275(92)90005-U

Influence of oxygen deficiency on the critical current properties of MPMG-processed YBa₂Cu₃O_7-δ

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

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The critical current density and the irreversibility field for melt-powder-melt growth (MPMG)-processed YBa₂Cu₃O_7-δ samples are determined magnetically in fields parallel to the c axis. Both J_c and B_irr are depressed with increase of oxygen deficiency. B_irr is not depressed appreciably with decrease of the concentration of Y₂BaCuO₅ precipitates in spite of a significant depression of J_c. A bump structure in the J_c(B) curve is observed and varies systematically with the oxygen deficiency. These results are compared to flux-pinning models.

Original language	English
Pages (from-to)	949-953
Number of pages	5
Journal	Cryogenics
Volume	32
Issue number	11
DOIs	https://doi.org/10.1016/0011-2275(92)90005-U
Publication status	Published - 1992
Externally published	Yes

Keywords

critical current
flux pinning
irreversibility line

ASJC Scopus subject areas

Materials Science(all)
Physics and Astronomy(all)

Access to Document

10.1016/0011-2275(92)90005-U

Cite this

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title = "Influence of oxygen deficiency on the critical current properties of MPMG-processed YBa2Cu3O7-δ",

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.",

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author = "N. Nakamura and M. Murakami and H. Fujimoto and N. Koshizuka",

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T1 - Influence of oxygen deficiency on the critical current properties of MPMG-processed YBa2Cu3O7-δ

AU - Nakamura, N.

AU - Murakami, M.

AU - Fujimoto, H.

AU - Koshizuka, N.

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

KW - critical current

KW - flux pinning

KW - irreversibility line

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