APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter UniPHY Group iResearch App Facebook

Applied Physics Letters / Volume 80 / Issue 5 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 80, 829 (2002); http://dx.doi.org/10.1063/1.1447010 (3 pages)

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

J. Horvat, X. L. Wang, S. Soltanian, and S. X. Dou

Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2522, Australia

(Received 28 September 2001; accepted 26 November 2001)

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.

© 2002 American Institute of Physics

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

magnesium compounds, iron, high-temperature superconductors, critical currents, critical current density (superconductivity), magnetic shielding

PACS

  • 74.25.Sv

    Critical currents

  • 74.72.-h

    Cuprate superconductors

  • 41.20.Gz

    Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1447010

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    G. Grasso, A. Malagoli, C. Ferdeghini, S. Roncallo, V. Braccini, M. R. Cimberle, and A. S. Sirri, Appl. Phys. Lett. 79, 230 (2001)APPLAB000079000002000230000001.

    Yu. A. Genenko, A. Snezhko, and H. C. Freyhardt, Phys. Rev. B 62, 3453 (2000).

    J. Friedel, P. G. de Gennes, and J. Matricon, Appl. Phys. Lett. 2, 119 (1963)APPLAB000002000006000119000001.


For access to citing articles, you need to log in.



Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. Improvement of critical current in MgB2/Fe superconducting wires by a ferromagnetic sheath
  2. Photonic crystals of core-shell colloidal particles
  3. Modified spontaneous emission in erbium-doped SiO2 spherical colloids
  4. Reduction of the acceptor impurity background in GaAs grown by molecular beam epitaxy
  5. Short circuit current improvement in planar heterojunction organic solar cells by multijunction charge transfer
Go to AIP Home
Copyright © American Institute of Physics
close