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邵晖,单迪,潘熙锋,闫果,王庆阳,熊晓梅.镁扩散制备Pr6O11掺杂的 MgB2块体临界电流密度和磁场性能研究[J].稀有金属材料与工程(英文),2018,47(10):2976~2979.[Hui Shao,Di Shan,Xifeng Pan,Guo Yan,Qingyang Wang and Xiaomei Xiong.Improved critical current density and magnetic properties of Pr6O11-doped MgB2 bulks synthesized by Mg-diffusion method[J].Rare Metal Materials and Engineering,2018,47(10):2976~2979.]
Improved critical current density and magnetic properties of Pr6O11-doped MgB2 bulks synthesized by Mg-diffusion method
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Received:October 24, 2017  Revised:August 29, 2018
DOI:
Key words: MgB2  Pr6O11 doping  critical current density  magnetic property
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Hui Shao,Di Shan,Xifeng Pan,Guo Yan,Qingyang Wang and Xiaomei Xiong  
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Abstract:
      The effects of the addition of Pr6O11 nanopowder on the critical current density (Jc), irreversibility field (Hirr) and upper critical field (Hc2) of the MgB2 bulks prepared by a Mg-diffusion method were investigated. The experimental results showed that Jc, Hirr and Hc2 of the MgB2 bulks have been enhanced systematically by Pr6O11 nanopowder doping, but the superconducting transition temperature (Tc) was little affected. At 20 K in a self-field, the Jc value for the 1 wt.% Pr6O11-doped MgB2 sample was 3.61×105A/cm2, which was nearly five times larger than the undoped sample. In addition, at 10 K, the Hc2 and Hirr of the bulk increased by 1.9 T and 2.6 T, respectively. The Pr6O11-dopingmechanism on superconductivity and flux pinning was also discussed.