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

Mohammed Shahabuddin, Nasser S. Alzayed, Sangjun Oh, Seyong Choi, Minoru Maeda, Satoshi Hata, Yusuke Shimada, Md Shahriar Al Hossain, Jung Ho Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

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.

Original languageEnglish
Article number017113
JournalAIP Advances
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 1 2014

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critical current
sintering
wire
current density
defects
impurities
scattering
voids
grain boundaries
grain size
disorders
porosity
electrical resistivity
temperature
augmentation
x rays

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density. / Shahabuddin, Mohammed; Alzayed, Nasser S.; Oh, Sangjun; Choi, Seyong; Maeda, Minoru; Hata, Satoshi; Shimada, Yusuke; Hossain, Md Shahriar Al; Kim, Jung Ho.

In: AIP Advances, Vol. 4, No. 1, 017113, 01.01.2014.

Research output: Contribution to journalArticle

Shahabuddin, Mohammed ; Alzayed, Nasser S. ; Oh, Sangjun ; Choi, Seyong ; Maeda, Minoru ; Hata, Satoshi ; Shimada, Yusuke ; Hossain, Md Shahriar Al ; Kim, Jung Ho. / Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density. In: AIP Advances. 2014 ; Vol. 4, No. 1.
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