Journal of Superconductivity and Novel Magnetism

, Volume 24, Issue 8, pp 2279–2283 | Cite as

SmFeAsO0.8F0.2 Wires Prepared Using Different Sheaths by the Powder-in-Tube Method

  • Y. L. ChenEmail author
  • Y. J. Cui
  • H. Zhang
  • C. H. Cheng
  • Y. Zhao
Original Paper


SmFeAsO0.8F0.2 wires with composite Cu/Nb or Ta sheaths have been fabricated using an in situ powder-in-tube method. Cu diffusion into the core was observed, which led to a fuzzy boundary between the sheath and core for Cu/Nb-sheathed SmFeAsO0.8F0.2 wires, and destroyed the superconducting phase of SmFeAsO0.8F0.2. However, superconductivity has been observed in the Ta-sheathed SmFeAsO0.8F0.2 wires with T c=52.5 K. A severe weak-link effect depressed the development of global supercurrent. A peak effect with a strongly temperature-dependent peak field H peak has been observed in the J cH curves over the range 10–40 K. The HT phase diagram was similar to that of a previous report.


SmFeAsO0.8F0.2 wires Superconductivity Peak effect Phase diagram 


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Y. L. Chen
    • 1
    Email author
  • Y. J. Cui
    • 1
  • H. Zhang
    • 1
  • C. H. Cheng
    • 2
  • Y. Zhao
    • 1
    • 2
  1. 1.Key Laboratory of Advanced Technology of Materials (Ministry of Education of China), Superconductivity R&D Center (SRDC)Southwest Jiaotong UniversityChengduChina
  2. 2.School of Materials Science and EngineeringUniversity of New South WalesSydneyAustralia

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