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

✍ Scribed by N. Nakamura; M. Murakami; H. Fujimoto; N. Koshizuka

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
449 KB
Volume
32
Category
Article
ISSN
0011-2275

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✦ Synopsis

The critical current density and the irreversibility field for melt-powder-melt-growth (MPMG)-processed YBa2Cu307_ ~ samples are determined magnetically in fields parallel to the c axis. Both Jc and Bir r are depressed with increase of oxygen deficiency. Bir r is not depressed appreciably with decrease of the concentration of Y2BaCuOs 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 fluxpinning models.

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