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Flux pinning and inhomogeneity in MgB2/Fe wires

Journal Article


Abstract


  • Transport critical current densities Jc and irreversibility fields of undoped and nanoparticle doped (10 wt% SiC) Fe-sheathed MgB2 wires were measured from 2 to 40 K in magnetic field . For the best segments of wires (d1 cm) both the magnitude and field variations of Jc and the pinning force density Fp=JcB depend only on the magnitude of , hence the strength of flux-pinning. of doped wire for is 1.4 times larger than that of undoped and reaches that of NbTi (10 T at 4.2 K) already at 20 K. Accordingly, its high-field Jcs and Fps are large, typically three times larger than the best literature results, and are limited by the porosity and inhomogeneity of the superconducting cores in present-day MgB2 wires.

Authors


  •   Husnjak, O (external author)
  •   Babic, E (external author)
  •   Kusevic, I (external author)
  •   Wang, Xiaolin
  •   Soltanian, Saeid (external author)
  •   Dou, Shi Xue

Publication Date


  • 2007

Citation


  • Husnjak, O., Babic, E., Kusevic, I., Wang, X., Soltanian, S. & Dou, S. Xue. (2007). Flux pinning and inhomogeneity in MgB2/Fe wires. Solid State Communications, 143 (8-9), 412-415.

Scopus Eid


  • 2-s2.0-34447641985

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/26

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 412

End Page


  • 415

Volume


  • 143

Issue


  • 8-9

Abstract


  • Transport critical current densities Jc and irreversibility fields of undoped and nanoparticle doped (10 wt% SiC) Fe-sheathed MgB2 wires were measured from 2 to 40 K in magnetic field . For the best segments of wires (d1 cm) both the magnitude and field variations of Jc and the pinning force density Fp=JcB depend only on the magnitude of , hence the strength of flux-pinning. of doped wire for is 1.4 times larger than that of undoped and reaches that of NbTi (10 T at 4.2 K) already at 20 K. Accordingly, its high-field Jcs and Fps are large, typically three times larger than the best literature results, and are limited by the porosity and inhomogeneity of the superconducting cores in present-day MgB2 wires.

Authors


  •   Husnjak, O (external author)
  •   Babic, E (external author)
  •   Kusevic, I (external author)
  •   Wang, Xiaolin
  •   Soltanian, Saeid (external author)
  •   Dou, Shi Xue

Publication Date


  • 2007

Citation


  • Husnjak, O., Babic, E., Kusevic, I., Wang, X., Soltanian, S. & Dou, S. Xue. (2007). Flux pinning and inhomogeneity in MgB2/Fe wires. Solid State Communications, 143 (8-9), 412-415.

Scopus Eid


  • 2-s2.0-34447641985

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/26

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 412

End Page


  • 415

Volume


  • 143

Issue


  • 8-9