Enhancement of transport critical current density of SmFeAsO 1-xFx tapes fabricated by an ex-situ powder-in-tube method with a Sn-presintering process

Qianjun Zhang, Chao Yao, He Lin, Xianping Zhang, Dongliang Wang, Chiheng Dong, Pusheng Yuan, Shaopu Tang, Yanwei Ma, Satoshi Awaji, Kazuo Watanabe, Yuji Tsuchiya, Tsuyoshi Tamegai

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14 Citations (Scopus)

Abstract

SmFeAsO1-xFx (Sm1111) tapes were prepared by an ex-situ powder-in-tube method with a Sn-presintering process. Scanning electron microscopy revealed apparent difference in microstructure between Sn-presintered tapes and the previously reported polycrystalline Sm1111 bulk, since Sn has reduced FeAs wetting phase and filled the voids between Sm1111 grains. The Sn-presintered tapes showed significant enhanced field dependences of transport Jc compared with Sn-added tapes. A highest transport critical current density (Jc) of 3.45×104A cm-2 at 4.2K and self-field is achieved. Magneto-optical imaging further confirmed large and well-distributed global and intergranular Jc in Sn-presintered Sm1111 tapes.

Original languageEnglish
Article number172601
JournalApplied Physics Letters
Volume104
Issue number17
DOIs
Publication statusPublished - 2014 Apr 28

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Zhang, Q., Yao, C., Lin, H., Zhang, X., Wang, D., Dong, C., Yuan, P., Tang, S., Ma, Y., Awaji, S., Watanabe, K., Tsuchiya, Y., & Tamegai, T. (2014). Enhancement of transport critical current density of SmFeAsO 1-xFx tapes fabricated by an ex-situ powder-in-tube method with a Sn-presintering process. Applied Physics Letters, 104(17), [172601]. https://doi.org/10.1063/1.4874261