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Improvement of critical current in MgB2/Fe superconducting wires by a ferromagnetic sheath

Appl. Phys. Lett. 80, 829 (2002); doi:10.1063/1.1447010

Issue Date: 4 February 2002

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J. Horvat, X. L. Wang, S. Soltanian, and S. X. Dou
Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2522, Australia
Transport critical current (Ic) was measured for Fe-sheathed MgB2 round wires. A critical current density of 5.3×104 A/cm2 was obtained at 32 K. Strong magnetic shielding by the iron sheath was observed, resulting in a decrease in Ic by only 15% in a field of 0.6 T at 32 K. In addition to shielding, interaction between the iron sheath and the superconductor resulted in a constant Ic between 0.2 and 0.6 T. This was well beyond the maximum field for effective shielding of 0.2 T. This effect can be used to substantially improve the field performance of MgB2/Fe wires at fields at least three times higher than the range allowed by mere magnetic shielding by the iron sheath. The dependence of Ic on the angle between field and current showed that the transport current does not flow straight across the wire, but meanders between the grains. ©2002 American Institute of Physics.
History: Received 28 September 2001; accepted 26 November 2001
Permalink: http://link.aip.org/link/?APPLAB/80/829/1
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KEYWORDS and PACS

Keywords
PACS
  • 74.60.Jg
    Superconductivity Type-II superconductivity Critical currents
  • 74.72.-h
    Superconductivity High-Tc compounds
  • 41.20.Gz
    Electromagnetism; electron and ion optics Applied classical electromagnetism Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems
  • YEAR: 2002

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (11)
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  1. J. Nagamatsu, N. Nakagawa, T. Muranaka, Y. Zenitani, and J. Akimitsu, Nature (London) 410, 63 (2001).
  2. P. C. Canfield, D. K. Finnemore, S. L. Bud'ko, J. E. Ostenson, G. Laperot, C. E. Cunningham, and C. Petrovic, Phys. Rev. Lett. 86, 2323 (2001).
  3. G. Grasso, A. Malagoli, C. Ferdeghini, S. Roncallo, V. Braccini, M. R. Cimberle, and A. S. Sirri, Appl. Phys. Lett. 79, 230 (2001).
  4. B. A. Glowacki, M. Majoros, M. Vickers, J. E. Evetts, Y. Shi, and I. McDougall, Supercond. Sci. Technol. 14, 193 (2001).
  5. S. Soltanian, X. L. Wang, I. Kusevic, E. Babic, A. H. Li, M. J. Qin, J. Horvat, H. K. Liu, E. W. Collings, E. Lee, M. D. Sumption, and S. X. Dou, Physica C 361, 84 (2001).
  6. M. Majoros, B. A. Glowacki, and A. M. Campbell, Physica C 334, 129 (2001).
  7. Yu. A. Genenko, A. Snezhko, and H. C. Freyhardt, Phys. Rev. B 62, 3453 (2000).
  8. M. D. Sumption, E. Lee, E. W. Collings, X. L. Wang, and S. X. Dou, "Suppression of AC (hysteretic) loss by magnetic shielding of MgB2/Fe superconductors: the pseudo-Meissner effect," Proc. of the ICMC 2001 Conference, Madison, WI, 16–21 July, 2001 (in press).
  9. X. L. Wang, S. Soltanian, J. Horvat, A. H. Liu, M. J. Qin, H. K. Liu, and S. X. Dou, Physica C 361, 149 (2001).
  10. T. Rikitake, Magnetic and Electromagnetic Shielding (Terra Scientific, Tokyo, 1987), p. 43.
  11. J. Friedel, P. G. de Gennes, and J. Matricon, Appl. Phys. Lett. 2, 119 (1963).

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