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Flux pinning in nanoparticle doped MgB2/Cu tapes

Journal Article


Abstract


  • The irreversibility fields Birr and critical current densities Jc of undoped and Si and SiC nanoparticle doped (5, 10 and 20 wt%) MgB2 tapes were measured in the temperature (T) range 238 K and in magnetic fields B 16 T. Whereas Birr of undoped tapes varies smoothly with T, those of doped tapes show a change in slope around a crossover field Bcr which increases with nanoparticle content and also depends on their type. This indicates matching effect in vortex pinning, probably associated with Mg2Si nanoprecipitates formed during heat treatment. Indeed, Birr of doped tapes was enhanced in respect to that of undoped one with the highest enhancement for Birr H Bcr, but the enhancement remained high H1.4 even for Birr Bcr (low temperatures). The variations of Jc and the pinning force density Fp = JcB with B and T support the above findings.

UOW Authors


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

Publication Date


  • 2007

Citation


  • Babic, E., Kusevic, I., Husnjak, O., Soltanian, S., Wang, X. & Dou, S. Xue. (2007). Flux pinning in nanoparticle doped MgB2/Cu tapes. Physica C: Superconductivity and its Applications, 460-462 (Part 1), 589-590.

Scopus Eid


  • 2-s2.0-34548161672

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/144

Has Global Citation Frequency


Number Of Pages


  • 1

Start Page


  • 589

End Page


  • 590

Volume


  • 460-462

Issue


  • Part 1

Abstract


  • The irreversibility fields Birr and critical current densities Jc of undoped and Si and SiC nanoparticle doped (5, 10 and 20 wt%) MgB2 tapes were measured in the temperature (T) range 238 K and in magnetic fields B 16 T. Whereas Birr of undoped tapes varies smoothly with T, those of doped tapes show a change in slope around a crossover field Bcr which increases with nanoparticle content and also depends on their type. This indicates matching effect in vortex pinning, probably associated with Mg2Si nanoprecipitates formed during heat treatment. Indeed, Birr of doped tapes was enhanced in respect to that of undoped one with the highest enhancement for Birr H Bcr, but the enhancement remained high H1.4 even for Birr Bcr (low temperatures). The variations of Jc and the pinning force density Fp = JcB with B and T support the above findings.

UOW Authors


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

Publication Date


  • 2007

Citation


  • Babic, E., Kusevic, I., Husnjak, O., Soltanian, S., Wang, X. & Dou, S. Xue. (2007). Flux pinning in nanoparticle doped MgB2/Cu tapes. Physica C: Superconductivity and its Applications, 460-462 (Part 1), 589-590.

Scopus Eid


  • 2-s2.0-34548161672

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/144

Has Global Citation Frequency


Number Of Pages


  • 1

Start Page


  • 589

End Page


  • 590

Volume


  • 460-462

Issue


  • Part 1