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

研究成果: Article › 査読

10 被引用数 (Scopus)

抄録

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.

本文言語	English
ページ（範囲）	949-953
ページ数	5
ジャーナル	Cryogenics
巻	32
号	11
DOI	https://doi.org/10.1016/0011-2275(92)90005-U
出版ステータス	Published - 1992
外部発表	はい

ASJC Scopus subject areas

材料科学（全般）
物理学および天文学（全般）

文献へのアクセス

10.1016/0011-2275(92)90005-U

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引用スタイル

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AU - Nakamura, N.

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AU - Fujimoto, H.

AU - Koshizuka, N.

PY - 1992

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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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