Combined effect of Sn addition and post-rolling sintering on the superconducting properties of SmFeAsO1-xFx tapes fabricated by an ex-situ powder-in-tube process

Qianjun Zhang; Chunlei Wang; Chao Yao; He Lin; Xianping Zhang; Dongliang Wang; Yanwei Ma; Satoshi Awaji; Kazuo Watanabe

doi:10.1063/1.4795814

Combined effect of Sn addition and post-rolling sintering on the superconducting properties of SmFeAsO_1-xF_x tapes fabricated by an ex-situ powder-in-tube process

Qianjun Zhang, Chunlei Wang, Chao Yao, He Lin, Xianping Zhang, Dongliang Wang, Yanwei Ma, Satoshi Awaji, Kazuo Watanabe

High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Polycrystalline Sn-added SmFeAsO_1-xF_x tapes were prepared by an ex-situ powder-in-tube method. It is found that the transport critical current density (J_c) of the SmFeAsO_1-xF _x tapes can be significantly improved with 10-30 wt. Sn addition. A transport J_c of 2.11 × 10⁴ A cm^-2 at 4.2 K in self-field was obtained in SmFeAsO_1-xF_x 30 wt. Sn sample. Most interestingly, Sn-added SmFeAsO_1-xF_x tapes without any sintering also showed substantial transport J_c of 9.81 × 10³ A cm^-2, which is reported for the first time. X-ray diffraction and scanning electron microscopy characterization revealed that the elemental Sn dispersed in the sample transformed into FeSn₂ during the post-rolling sintering (PRS). The reaction between Sn and FeAs helps to eliminate the detrimental FeAs wetting phase, which blocks the supercurrent path between SmFeAsO_1-xF_x grains. The combined impact of fluorine loss and Sn reaction was discussed in this work by varying the Sn addition quantity and PRS condition.

Original language	English
Article number	123902
Journal	Journal of Applied Physics
Volume	113
Issue number	12
DOIs	https://doi.org/10.1063/1.4795814
Publication status	Published - 2013 Mar 28

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.4795814

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@article{51cc5467e2e64a5b9ea93395f796c120,

title = "Combined effect of Sn addition and post-rolling sintering on the superconducting properties of SmFeAsO1-xFx tapes fabricated by an ex-situ powder-in-tube process",

abstract = "Polycrystalline Sn-added SmFeAsO1-xFx tapes were prepared by an ex-situ powder-in-tube method. It is found that the transport critical current density (Jc) of the SmFeAsO1-xF x tapes can be significantly improved with 10-30 wt. Sn addition. A transport Jc of 2.11 × 104 A cm-2 at 4.2 K in self-field was obtained in SmFeAsO1-xFx 30 wt. Sn sample. Most interestingly, Sn-added SmFeAsO1-xFx tapes without any sintering also showed substantial transport Jc of 9.81 × 103 A cm-2, which is reported for the first time. X-ray diffraction and scanning electron microscopy characterization revealed that the elemental Sn dispersed in the sample transformed into FeSn2 during the post-rolling sintering (PRS). The reaction between Sn and FeAs helps to eliminate the detrimental FeAs wetting phase, which blocks the supercurrent path between SmFeAsO1-xFx grains. The combined impact of fluorine loss and Sn reaction was discussed in this work by varying the Sn addition quantity and PRS condition.",

author = "Qianjun Zhang and Chunlei Wang and Chao Yao and He Lin and Xianping Zhang and Dongliang Wang and Yanwei Ma and Satoshi Awaji and Kazuo Watanabe",

note = "Funding Information: This work was supported by the National “973” Program (Grant No. 2011CBA00105) and National Natural Science Foundation of China (Grant Nos. 51025726, 51202243, and 51172230).",

year = "2013",

month = mar,

day = "28",

doi = "10.1063/1.4795814",

language = "English",

volume = "113",

journal = "Journal of Applied Physics",

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TY - JOUR

T1 - Combined effect of Sn addition and post-rolling sintering on the superconducting properties of SmFeAsO1-xFx tapes fabricated by an ex-situ powder-in-tube process

AU - Zhang, Qianjun

AU - Wang, Chunlei

AU - Yao, Chao

AU - Lin, He

AU - Zhang, Xianping

AU - Wang, Dongliang

AU - Ma, Yanwei

AU - Awaji, Satoshi

AU - Watanabe, Kazuo

N1 - Funding Information: This work was supported by the National “973” Program (Grant No. 2011CBA00105) and National Natural Science Foundation of China (Grant Nos. 51025726, 51202243, and 51172230).

PY - 2013/3/28

Y1 - 2013/3/28

N2 - Polycrystalline Sn-added SmFeAsO1-xFx tapes were prepared by an ex-situ powder-in-tube method. It is found that the transport critical current density (Jc) of the SmFeAsO1-xF x tapes can be significantly improved with 10-30 wt. Sn addition. A transport Jc of 2.11 × 104 A cm-2 at 4.2 K in self-field was obtained in SmFeAsO1-xFx 30 wt. Sn sample. Most interestingly, Sn-added SmFeAsO1-xFx tapes without any sintering also showed substantial transport Jc of 9.81 × 103 A cm-2, which is reported for the first time. X-ray diffraction and scanning electron microscopy characterization revealed that the elemental Sn dispersed in the sample transformed into FeSn2 during the post-rolling sintering (PRS). The reaction between Sn and FeAs helps to eliminate the detrimental FeAs wetting phase, which blocks the supercurrent path between SmFeAsO1-xFx grains. The combined impact of fluorine loss and Sn reaction was discussed in this work by varying the Sn addition quantity and PRS condition.

AB - Polycrystalline Sn-added SmFeAsO1-xFx tapes were prepared by an ex-situ powder-in-tube method. It is found that the transport critical current density (Jc) of the SmFeAsO1-xF x tapes can be significantly improved with 10-30 wt. Sn addition. A transport Jc of 2.11 × 104 A cm-2 at 4.2 K in self-field was obtained in SmFeAsO1-xFx 30 wt. Sn sample. Most interestingly, Sn-added SmFeAsO1-xFx tapes without any sintering also showed substantial transport Jc of 9.81 × 103 A cm-2, which is reported for the first time. X-ray diffraction and scanning electron microscopy characterization revealed that the elemental Sn dispersed in the sample transformed into FeSn2 during the post-rolling sintering (PRS). The reaction between Sn and FeAs helps to eliminate the detrimental FeAs wetting phase, which blocks the supercurrent path between SmFeAsO1-xFx grains. The combined impact of fluorine loss and Sn reaction was discussed in this work by varying the Sn addition quantity and PRS condition.

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Combined effect of Sn addition and post-rolling sintering on the superconducting properties of SmFeAsO_1-xF_x tapes fabricated by an ex-situ powder-in-tube process

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