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 Article

Zhang, Q, Wang, C, Yao, C et al. (2013). 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 . 113(12), 10.1063/1.4795814



cited authors

  • Zhang, Q; Wang, C; Yao, C; Lin, H; Zhang, X; Wang, D; Ma, Y; Awaji, S; Watanabe, K

fiu authors

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. © 2013 American Institute of Physics.

publication date

  • March 28, 2013

Digital Object Identifier (DOI)

volume

  • 113

issue

  • 12