Direct observation and analysis of nanoscale precipitates in (Sm,Eu,Gd)Ba2Cu3Oy

DOI PDF 被引用文献11件
  • M. Muralidhar
    Superconductivity Research Laboratory (SRL), International Superconductivity Technology Center , 3-35-2, Iioka-Shinden, Morioka 020-0852, Japan
  • N. Sakai
    Superconductivity Research Laboratory (SRL), International Superconductivity Technology Center , 3-35-2, Iioka-Shinden, Morioka 020-0852, Japan
  • M. Jirsa
    Superconductivity Research Laboratory (SRL), International Superconductivity Technology Center , 3-35-2, Iioka-Shinden, Morioka 020-0852, Japan
  • N. Koshizuka
    Superconductivity Research Laboratory (SRL), International Superconductivity Technology Center , 3-35-2, Iioka-Shinden, Morioka 020-0852, Japan
  • M. Murakami
    Shibaura Institute of Technology , Shibaura 3-9-14, Minato-ku, Tokyo 108-8548, Japan and , 3-35-2, Iioka-Shinden, Morioka 020-0852, Japan

書誌事項

公開日
2004-10-18
DOI
  • 10.1063/1.1805709
公開者
AIP Publishing

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説明

<jats:p>We employed atomic-resolution high-angle annular dark-field scanning transmission electron microscope to characterize the chemical composition and nature of the nanoparticles dispersed in melt-processed (Sm0.33Eu0.33Gd0.33)Ba2Cu3Oy superconductor. We found two types of stable nanometer-scale particles, small LRE-Ba2CuZrOy and (LRE,Zr)BaCuOy(LRE=Sm,Eu,Gd) ones, in the 10–60nm range, and larger particles of Gd2BaCuO5 “Gd-211,” around 100nm in size. A substantial increase of critical current density was observed up to 90K. Experimental data were interpreted in terms of additive pinning by “large” defects and a point-like disorder. The nanosized particles open a new horizon for production of bulk high-Tc superconducting magnets.</jats:p>

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