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Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density

Journal Article


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Abstract


  • A comprehensive study of the effects of structural imperfections in MgB2 superconducting wire has been conducted. As the sintering temperature becomes lower, the structural imperfections of the MgB2 material are increased, as reflected by detailed X-ray refinement and the normal state resistivity. The crystalline imperfections, caused by lattice disorder, directly affect the impurity scattering between the π and σ bands of MgB2, resulting in a larger upper critical field. In addition, low sintering temperature keeps the grain size small, which leads to a strong enhancement of pinning, and thereby, enhanced critical current density. Owing to both the impurity scattering and the grain boundary pinning, the critical current density, irreversibility field, and upper critical field are enhanced. Residual voids or porosities obviously remain in the MgB2, however, even at low sintering temperature, and thus block current transport paths.

UOW Authors


  •   Shahabuddin, Mohammed (external author)
  •   Alzayed, Nasser Saleh (external author)
  •   Oh, Sangjun (external author)
  •   Choi, Seyong (external author)
  •   Maeda, Minoru (external author)
  •   Hata, Satoshi (external author)
  •   Shimada, Yusuke (external author)
  •   Hossain, Md Shahriar
  •   Kim, Jung Ho

Publication Date


  • 2014

Citation


  • Shahabuddin, M., Alzayed, N. S., Oh, S., Choi, S., Maeda, M., Hata, S., Shimada, Y., Al Hossain, M. & Kim, J. (2014). Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density. AIP Advances, 4 (1), 017113-1-017113-11.

Scopus Eid


  • 2-s2.0-84893835594

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2217&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1216

Has Global Citation Frequency


Start Page


  • 017113-1

End Page


  • 017113-11

Volume


  • 4

Issue


  • 1

Place Of Publication


  • United States

Abstract


  • A comprehensive study of the effects of structural imperfections in MgB2 superconducting wire has been conducted. As the sintering temperature becomes lower, the structural imperfections of the MgB2 material are increased, as reflected by detailed X-ray refinement and the normal state resistivity. The crystalline imperfections, caused by lattice disorder, directly affect the impurity scattering between the π and σ bands of MgB2, resulting in a larger upper critical field. In addition, low sintering temperature keeps the grain size small, which leads to a strong enhancement of pinning, and thereby, enhanced critical current density. Owing to both the impurity scattering and the grain boundary pinning, the critical current density, irreversibility field, and upper critical field are enhanced. Residual voids or porosities obviously remain in the MgB2, however, even at low sintering temperature, and thus block current transport paths.

UOW Authors


  •   Shahabuddin, Mohammed (external author)
  •   Alzayed, Nasser Saleh (external author)
  •   Oh, Sangjun (external author)
  •   Choi, Seyong (external author)
  •   Maeda, Minoru (external author)
  •   Hata, Satoshi (external author)
  •   Shimada, Yusuke (external author)
  •   Hossain, Md Shahriar
  •   Kim, Jung Ho

Publication Date


  • 2014

Citation


  • Shahabuddin, M., Alzayed, N. S., Oh, S., Choi, S., Maeda, M., Hata, S., Shimada, Y., Al Hossain, M. & Kim, J. (2014). Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density. AIP Advances, 4 (1), 017113-1-017113-11.

Scopus Eid


  • 2-s2.0-84893835594

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2217&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1216

Has Global Citation Frequency


Start Page


  • 017113-1

End Page


  • 017113-11

Volume


  • 4

Issue


  • 1

Place Of Publication


  • United States