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,2018,47(10):2976~2979.[Hui Shao,Di Shan,Xifeng Pan,Guo Yan,Qingyang Wang,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.]
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
投稿时间:2017-10-24  修订日期:2018-08-29
中文关键词:  MgB2  Pr6O11掺杂  临界电流密度  磁场性能
基金项目:
中文摘要:
      采用镁扩散方法制备了Pr6O11纳米颗粒添加的MgB2超导块体,研究了Pr6O11掺杂对其临界电流密度(Jc),不可逆磁场(Hirr)和上临界磁场(Hc2)的影响。实验结果表明Pr6O11纳米颗粒掺杂明显提高了块体的Jc,Hirr和Hc2,但没有降低其超导转变温度Tc。在20 K自场条件下,质量比为1 wt.% Pr6O11掺杂的MgB2块体的Jc较没掺杂样品提高了将近5倍, Jc=3.61×105A/cm2。在10 K温度下,MgB2块体Hc2 和Hirr较没掺杂样品分别提高了1.9 T and 2.6 T。同时讨论了Pr6O11纳米颗粒掺杂对MgB2块体的电性能和磁通钉扎机制的影响。
Improved critical current density and magnetic properties of Pr6O11-doped MgB2 bulks synthesized by Mg-diffusion method
英文关键词:MgB2  Pr6O11 doping  critical current density  magnetic property
英文摘要:
      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.
作者单位E-mail
邵晖 西安理工大学 shaohui@xaut.edu.cn 
单迪 西安理工大学 shandigood@163.com 
潘熙锋 西部超导材料科技股份有限公司超导材料制备国家工程实验室  
闫果 西部超导材料科技股份有限公司超导材料制备国家工程实验室  
王庆阳 西北有色金属研究院超导材料研究所  
熊晓梅 西北有色金属研究院超导材料研究所  
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