Magnetic Response of a Single-Crystal Thin Film Bi_2Sr_2CaCu_2Oy

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To test the utility of the modified Kim-Anderson model for study of the magnetic response of ceramic superconductors, we measured ac complex susceptibilities x<SUB>n</SUB>=x'<SUB>n</SUB>-ix"<SUB>n</SUB>(n=1, 2, 3, 5, 7) of a single-crystal thin film Bi<SUB>2</SUB>Sr<SUB>2</SUB>CaCu<SUB>2</SUB>O<SUB>y</SUB>, and attempted to simulate the results in the framework of this model. Analyses of x<SUB>n</SUB>, have shown that generation of the higher-harmonics can be reproduced pretty well, where the material parameters k and B<SUB>0</SUB>, the surface barrier ΔH and the lower critical field H<SUB>CI</SUB> involved were used as the fitting parameters. From the even-n harmonic susceptibility x<SUB>2</SUB> which reflects the asymmetric nature of the magnetization curve, we foundthat the critical-current density J<SUB>c</SUB> of the Bi<SUB>2</SUB>Sr<SUB>2</SUB>CaCu<SUB>2</SUB>O<SUB>y</SUB> film depends sensitively on the local flux density B<SUB>i</SUB>. This result is a provoking contrast to the B<SUB>i</SUB>, dependence of J<SUB>c</SUB>. for an YBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>y</SUB> film.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 44(8), 787-791, 1997-08-15

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002014463
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4275746
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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