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Flux pinning, granularity and the irreversibility line of the high-critical temperature superconductor mercury-barium(2)-copper-oxide(4+).

Author(s) : UMEZAWA A., ZHANG W., GUREVICH A., FENG Y., HELLSTROM E. E., LARBALESTIER D. C.

Type of article: Article

Summary

The authors report that high irreversibility field is indeed significantly higher than for the two- and three-copper-layer BSCCO compounds (bismuth-2212 and -2223), but lower than for YBCO (yttrium-123). The low-temperature flux pinning is also strong. Like yttrium-123, however, mercury-1201 is electromagnetically granular. A high degree of grain alignment will probably be necessary to remove this granularity; by analogy with the bismuth compounds, this is likely to be easier if the two-mercure-layer counterparts of bismuth-22XY (mercury-2201, -2212 or -2223) can be synthesized.

Details

  • Original title: Flux pinning, granularity and the irreversibility line of the high-critical temperature superconductor mercury-barium(2)-copper-oxide(4+).
  • Record ID : 1994-2087
  • Languages: English
  • Source: Nature - vol. 364 - n. 6433
  • Publication date: 1993/07/08
  • Document available for consultation in the library of the IIR headquarters only.

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