Enhancement of Flux-Pinning in Epitaxial Sm1+xBa2-xCu3Oy Films by Introduction of Low-$T_{\text{c}}$ Nanoparticles

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著者

    • Miura Masashi Miura Masashi
    • Department of Electrical Engineering and Computer Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
    • Takai Yoshiaki
    • Department of Electrical Engineering and Computer Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
    • Matsumoto Kaname
    • Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
    • Ichinose Ataru
    • Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan
    • Horii Shigeru
    • Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8586, Japan
    • Mukaida Masashi
    • Department of Materials Science and Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan

抄録

Sm1+xBa2-xCu3Oy (SmBCO) films prepared by the low-temperature growth (LTG) technique showed a critical current density ($J_{\text{c}}$) as high as 0.28 MA/cm2 (77 K, $B\parallel c$, $B=5$ T). However, $J_{\text{c}}$ was lower than that of NbTi wire (4.2 K) above 5 T. In this study, we introduced nanoparticle superconductors with a low critical temperature (low-$T_{\text{c}}$) into LTG-SmBCO "LTG-SmBCO + nanoparticle" films to improve $J_{\text{c}}$ under the high magnetic field, and obtained an extremely high $J_{\text{c}}$, 0.1 MA/cm2 (77 K, $B\parallel c$, $B=8$ T). Energy-dispersive X-ray spectroscopy (EDX) showed that the "LTG-SmBCO + nanoparticle" films had a nanosize low-$T_{\text{c}}$ phase and a low-$T_{\text{c}}$ network dispersed in the high-$T_{\text{c}}$ matrix. We concluded that the "LTG-SmBCO + nanoparticle" films could have enhanced $J_{\text{c}}$ by the introduction of pinning centers and the improvement of irreversibility field ($B_{\text{irr}}$).

収録刊行物

  • Japanese journal of applied physics. Pt. 2, Letters  

    Japanese journal of applied physics. Pt. 2, Letters 45(1), L11-L13, 2006-01-25 

    Japan Society of Applied Physics

参考文献:  14件

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被引用文献:  7件

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各種コード

  • NII論文ID(NAID)
    10018159360
  • NII書誌ID(NCID)
    AA10650595
  • 本文言語コード
    EN
  • 資料種別
    SHO
  • ISSN
    0021-4922
  • NDL 記事登録ID
    7790246
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z54-J337
  • データ提供元
    CJP書誌  CJP引用  NDL  JSAP 
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