Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density
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. T...
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doaj-79bc360fac894f57bb0c959011cad2b32020-11-24T21:35:07ZengAIP Publishing LLCAIP Advances2158-32262014-01-0141017113017113-1110.1063/1.4862670013401ADVMicrostructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current densityMohammed Shahabuddin0Nasser S. Alzayed1Sangjun Oh2Seyong Choi3Minoru Maeda4Satoshi Hata5Yusuke Shimada6Md Shahriar Al Hossain7Jung Ho Kim8Department of Physics and Astronomy, College of Science, P. O. Box 2455, King Saud University, Riyadh 11451, Kingdom of Saudi ArabiaDepartment of Physics and Astronomy, College of Science, P. O. Box 2455, King Saud University, Riyadh 11451, Kingdom of Saudi ArabiaMaterials Research Team, National Fusion Research Institute, Yueeong, Daejeon 305-333, Republic of KoreaBusan Center, Korea Basic Science Institute, Geumjeong, Busan 609-735, Republic of KoreaDepartment of Physics, College of Science and Technology, Nihon University, 1-8 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8308, JapanInterdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, JapanInterdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, JapanInstitute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, New South Wales 2500, AustraliaDepartment of Physics and Astronomy, College of Science, P. O. Box 2455, King Saud University, Riyadh 11451, Kingdom of Saudi ArabiaA 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.http://dx.doi.org/10.1063/1.4862670 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mohammed Shahabuddin Nasser S. Alzayed Sangjun Oh Seyong Choi Minoru Maeda Satoshi Hata Yusuke Shimada Md Shahriar Al Hossain Jung Ho Kim |
spellingShingle |
Mohammed Shahabuddin Nasser S. Alzayed Sangjun Oh Seyong Choi Minoru Maeda Satoshi Hata Yusuke Shimada Md Shahriar Al Hossain Jung Ho Kim Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density AIP Advances |
author_facet |
Mohammed Shahabuddin Nasser S. Alzayed Sangjun Oh Seyong Choi Minoru Maeda Satoshi Hata Yusuke Shimada Md Shahriar Al Hossain Jung Ho Kim |
author_sort |
Mohammed Shahabuddin |
title |
Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density |
title_short |
Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density |
title_full |
Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density |
title_fullStr |
Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density |
title_full_unstemmed |
Microstructural and crystallographic imperfections of MgB2 superconducting wire and their correlation with the critical current density |
title_sort |
microstructural and crystallographic imperfections of mgb2 superconducting wire and their correlation with the critical current density |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2014-01-01 |
description |
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. |
url |
http://dx.doi.org/10.1063/1.4862670 |
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