Record flux pinning in melt-textured NEG-123 doped by Mo and Nb nanoparticles

DOI PDF 被引用文献9件
  • M. Muralidhar
    Superconductivity Research Laboratory (SRL) 1 , International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-Ku, Tokyo 135-0062, Japan
  • N. Sakai
    Institute of Physics 2 , ASCR, CZ-182 21 Praha 8, Czech Republic
  • M. Jirsa
    Institute of Physics 2 , ASCR, CZ-182 21 Praha 8, Czech Republic
  • M. Murakami
    Shibaura Institute of Technology 3 , 3-9-14 Shibaura, Minato-ku, Tokyo 108-8548, Japan
  • I. Hirabayashi
    Superconductivity Research Laboratory (SRL) 1 , International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-Ku, Tokyo 135-0062, Japan

書誌事項

公開日
2008-04-21
DOI
  • 10.1063/1.2908929
公開者
AIP Publishing

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<jats:p>We report on a highly improved pinning performance in the melt-textured (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy+35mol% Gd2BaCuO5 (70nm in size) composite doped by tiny amounts of nanometer-sized MoO3 or NbO3 particles. The doping led to a spontaneous formation of clouds with extremely small (⩽10nm) (Nd,Eu,Gd)2BaCuXO5 particles, X=Mo,Nb. With an optimum content of MoO3 and NbO3, the self-field supercurrent at 77K was twofold and threefold higher than before, respectively. At 65K the supercurrent reached 700kA∕cm2 with Mo and 925kA∕cm2 with Nb at both 0 and 4.5T, and the self-field current at 90K was 100A∕cm2 in the Nb-doped sample, which is a value high enough for a safe levitation.</jats:p>

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