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High Trapped Fields in C-doped MgB2 Bulk Superconductors Fabricated by Infiltration and Growth Process.

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cam.issuedOnline2018-09-06
dc.contributor.authorBhagurkar, AG
dc.contributor.authorYamamoto, A
dc.contributor.authorWang, L
dc.contributor.authorXia, M
dc.contributor.authorDennis, AR
dc.contributor.authorDurrell, JH
dc.contributor.authorAljohani, TA
dc.contributor.authorBabu, NH
dc.contributor.authorCardwell, DA
dc.contributor.orcidDurrell, JH [0000-0003-0712-3102]
dc.date.accessioned2018-11-20T00:30:22Z
dc.date.available2018-11-20T00:30:22Z
dc.date.issued2018-09-06
dc.description.abstractThe grain boundaries in superconducting MgB2 are known to form effective magnetic flux pinning sites and, consequently, bulk MgB2 containing a fine-grain microstructure fabricated from nanoscale Mg and B precursor powders exhibits good magnetic field-trapping performance below 20 K. We report here that the trapped field of MgB2 bulk superconductors fabricated by an infiltration and growth process to yield a dense, pore-free microstructure, can be enhanced significantly by carbon-doping, which increases intra-band scattering within the superconducting grains. A maximum trapped field of 4.15 T has been measured at 7.5 K at the centre of a five-sample stack of Mg(B1-xiCxi)2 bulk superconductors processed by infiltration and growth, which not only represents a ~40% increase in trapped field observed compared to undoped bulk MgB2, but also is the highest trapped field reported to date in MgB2 samples processed under ambient pressure. The trapped field is observed to decay at a rate of <2%/day at 10 K, which suggests that bulk MgB2 superconductors fabricated using the infiltration and growth technique can be used potentially to generate stable, high magnetic fields for a variety of engineering applications.
dc.format.mediumElectronic
dc.identifier.doi10.17863/CAM.32796
dc.identifier.eissn2045-2322
dc.identifier.issn2045-2322
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/285436
dc.languageeng
dc.language.isoeng
dc.publisherSpringer Science and Business Media LLC
dc.publisher.urlhttp://dx.doi.org/10.1038/s41598-018-31416-3
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject51 Physical Sciences
dc.subject5104 Condensed Matter Physics
dc.titleHigh Trapped Fields in C-doped MgB2 Bulk Superconductors Fabricated by Infiltration and Growth Process.
dc.typeArticle
dcterms.dateAccepted2018-08-14
prism.issueIdentifier1
prism.publicationDate2018
prism.publicationNameSci Rep
prism.startingPage13320
prism.volume8
pubs.funder-project-idJapan Society for the Promotion of Science (15H05519)
rioxxterms.licenseref.startdate2018-09-06
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1038/s41598-018-31416-3

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