Effect of nano-C doping on the critical current density and flux pinning of MgB2 tapes

Xianping Zhang, Ma Yanwei, Zhaoshun Gao, Dongliang Wang, Z. Yu, Satoshi Awaji, Gen Nishijima, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Nano-C doped Fe-sheathed MgB2 tapes with different doping levels were fabricated using a powder-in-tube method and an in situ reaction. The effects of nano-C doping on the transition critical temperature, microstructure, critical current density, and flux pinning of MgB2 tapes were studied. Compared to the undoped tapes, critical current density Jc for all the C-doped samples with different doping level was enhanced by more than an order of magnitude in magnetic fields above 10 T. This result indicates that flux pinning was effectively enhanced by the nano-C doping. Highly dispersed nanoparticles and the substitutions of B by C are proposed to be responsible for the improvement of Jc -B properties.

Original languageEnglish
Pages (from-to)2915-2918
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2
Publication statusPublished - 2007 Jun


  • Critical current property
  • Flux pinning
  • MgB
  • Nano-C doping

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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