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Quantification of the level of samarium/barium substitution in the Ag-Sm1+xBa2-xCu3O7-δ system

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dc.contributor.authorZhao, Wen
dc.contributor.authorShi, Yunhua
dc.contributor.authorZhou, Difan
dc.contributor.authorDennis, Anthony R
dc.contributor.authorCardwell, David A
dc.contributor.orcidShi, Yunhua [0000-0003-4240-5543]
dc.contributor.orcidDennis, Tony [0000-0003-4962-7149]
dc.contributor.orcidCardwell, David [0000-0002-2020-2131]
dc.date.accessioned2018-07-10T14:36:04Z
dc.date.available2018-07-10T14:36:04Z
dc.date.issued2018
dc.description.abstractThe high-temperature SmBa2Cu3O7-δ (Sm-123) superconducting system, which is characterised by a high critical transition temperature (Tc) and a high critical current density (Jc), suffers severely from the effects of Sm/Ba substitution in the superconducting Sm-123 phase matrix, and especially so for large, single grains grown in air, resulting in a significant variation in Tc at different positions within a single grain. As a result, the suppression of Sm/Ba substitution in the Sm1+xBa2-xCu3O7-δ phase matrix (SmBCO, where x represents the Sm/Ba substitution level in the SmBCO system) is critical to achieving good superconducting properties in this material. Here we report the use of Electron Probe Micro-Analysis (EPMA) to investigate, adjust and optimise the composition of mechanically-stabilised standard Ag-SmBCO bulk single grains. We show that the substitution levels within these samples changes linearly within increasing distance from the vicinity of a single crystal seed used to nucleate the single grain growth process. In addition, we identify a constant value of x of – 0.080 for the composition-adjusted Ag-SmBCO bulk single grain. This is the first time that the quantification of the Sm/Ba substitution level in the SmBCO system has been measured accurately and directly using EPMA, and suggests clearly that the Sm/Ba substitution can be suppressed effectively in air. This research will provide significant insight into the development of a process to suppress Sm/Ba substitution even further in superconducting SmBCO single grains in the future.
dc.identifier.doi10.17863/CAM.25321
dc.identifier.eissn1873-619X
dc.identifier.issn0955-2219
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/277991
dc.language.isoeng
dc.publisherElsevier
dc.subjectSuperconductor
dc.subjectPerovskites
dc.subjectRare-earth
dc.subjectElectron Probe Micro-Analysis (EPMA)
dc.titleQuantification of the level of samarium/barium substitution in the Ag-Sm<sub>1+x</sub>Ba<sub>2-x</sub>Cu<sub>3</sub>O<sub>7-δ</sub> system
dc.typeArticle
dcterms.dateAccepted2018-07-05
prism.endingPage5042
prism.issueIdentifier15
prism.publicationDate2018
prism.publicationNameJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
prism.startingPage5036
prism.volume38
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P00962X/1)
rioxxterms.licenseref.startdate2018-12
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1016/j.jeurceramsoc.2018.07.007

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