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Enhancement of transport critical current density of SmFeAsO1−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 (+1 others)
2014 Applied Physics Letters  

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2014 pre-print arXiv:1405.6835v1 fatcat:53crvzh2xnchbidvr3iwzexa4a
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
more » ... l current density (Jc) of 3.45x10^4 A cm-2 at 4.2 K and self-field is achieved. Magneto-optical (MO) imaging further confirmed large and well-distributed global and intergranular Jc in Sn-presintered Sm1111 tapes.
doi:10.1063/1.4874261 fatcat:oagewez2wfeippei66zlubyzey
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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. "Enhancement of transport critical current density of SmFeAsO1−xFx tapes fabricated by an ex-situ powder-in-tube method with a Sn-presintering process." Applied Physics Letters 104.17 (2014) 172601