Investigation of Jc-Suppressing Factors in Flat-Rolled Sr0.6K0.4Fe2As2Fe Tapes Via Microstructure Analysis

Handle URI:
http://hdl.handle.net/10754/556676
Title:
Investigation of Jc-Suppressing Factors in Flat-Rolled Sr0.6K0.4Fe2As2Fe Tapes Via Microstructure Analysis
Authors:
Zhang, Xianping; Wang, Qingxiao; Li, Kun; Cai, Yao; Jiang, Fuguo; Wang, Zhen; Li, Jianqi; Yao, Chao; Lin, He; Zhang, Qianjun; Dong, Chiheng; Wang, Dongliang; Zhang, Xixiang ( 0000-0002-3478-6414 ) ; Ma, Yanwei
Abstract:
Pnictide superconductors will be very promising for applications if wires with high critical current density Jc can allow reel-to-reel large-scale fabrication at low costs. To understand the mechanism(s) that limited Jc in flat-rolled Sr0.6K0.4Fe2As2(Sr122) tapes, microstructure analysis has been considered the most direct and efficient way. Here, we report on high-resolution microstructure imaging and analysis on Fe-sheathed flat-rolled Sr122 tapes, which have a Jc as high as 2.3 × 104 A/cm2 at 10 T and 4.2 K. The overlapping nature of the Sr122 plates was clearly observed. Transmission electron microscopy/scanning transmission electron microscopy analysis showed that, besides the cracks formed during the fabrication process, the SrO2 phase and cavities caused by the inhomogeneously dispersed Sr and K are the other important factors suppressing Jc. The wetting phase FeAs at the grain boundaries can be partially substituted by Sn in Sn-added samples. Our findings provide insights that pave the way to further enhance the critical current of the rolled 122 tapes up to the practical level.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Investigation of Jc-Suppressing Factors in Flat-Rolled Sr0.6K0.4Fe2As2Fe Tapes Via Microstructure Analysis 2015, 25 (3):1 IEEE Transactions on Applied Superconductivity
Journal:
IEEE Transactions on Applied Superconductivity
Issue Date:
13-Jan-2015
DOI:
10.1109/TASC.2014.2360647
Type:
Article
ISSN:
1051-8223; 1558-2515
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6912938
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Xianpingen
dc.contributor.authorWang, Qingxiaoen
dc.contributor.authorLi, Kunen
dc.contributor.authorCai, Yaoen
dc.contributor.authorJiang, Fuguoen
dc.contributor.authorWang, Zhenen
dc.contributor.authorLi, Jianqien
dc.contributor.authorYao, Chaoen
dc.contributor.authorLin, Heen
dc.contributor.authorZhang, Qianjunen
dc.contributor.authorDong, Chihengen
dc.contributor.authorWang, Dongliangen
dc.contributor.authorZhang, Xixiangen
dc.contributor.authorMa, Yanweien
dc.date.accessioned2015-06-10T11:46:20Zen
dc.date.available2015-06-10T11:46:20Zen
dc.date.issued2015-01-13en
dc.identifier.citationInvestigation of Jc-Suppressing Factors in Flat-Rolled Sr0.6K0.4Fe2As2Fe Tapes Via Microstructure Analysis 2015, 25 (3):1 IEEE Transactions on Applied Superconductivityen
dc.identifier.issn1051-8223en
dc.identifier.issn1558-2515en
dc.identifier.doi10.1109/TASC.2014.2360647en
dc.identifier.urihttp://hdl.handle.net/10754/556676en
dc.description.abstractPnictide superconductors will be very promising for applications if wires with high critical current density Jc can allow reel-to-reel large-scale fabrication at low costs. To understand the mechanism(s) that limited Jc in flat-rolled Sr0.6K0.4Fe2As2(Sr122) tapes, microstructure analysis has been considered the most direct and efficient way. Here, we report on high-resolution microstructure imaging and analysis on Fe-sheathed flat-rolled Sr122 tapes, which have a Jc as high as 2.3 × 104 A/cm2 at 10 T and 4.2 K. The overlapping nature of the Sr122 plates was clearly observed. Transmission electron microscopy/scanning transmission electron microscopy analysis showed that, besides the cracks formed during the fabrication process, the SrO2 phase and cavities caused by the inhomogeneously dispersed Sr and K are the other important factors suppressing Jc. The wetting phase FeAs at the grain boundaries can be partially substituted by Sn in Sn-added samples. Our findings provide insights that pave the way to further enhance the critical current of the rolled 122 tapes up to the practical level.en
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6912938en
dc.rights(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.en
dc.subjectJcen
dc.subjectPnictide superconductorsen
dc.subjectmicrostructureen
dc.subjectpnictide superconductorsen
dc.subjectwiresen
dc.titleInvestigation of Jc-Suppressing Factors in Flat-Rolled Sr0.6K0.4Fe2As2Fe Tapes Via Microstructure Analysisen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalIEEE Transactions on Applied Superconductivityen
dc.eprint.versionPost-printen
dc.contributor.institutionInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, Chinaen
dc.contributor.institutionBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Chinaen
kaust.authorWang, Qingxiaoen
kaust.authorLi, Kunen
kaust.authorZhang, Xixiangen
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