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Magnetization and Critical Current of Calcium-doped YBa2Cu3O7−x Composite Films

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Abstract

The results of the study of magnetization of Y1−x Ca x Ba2Cu3O7−δ HTS films deposited on the metallic substrate are presented. The magnetization measurements were carried out in a wide temperature range 4–77 K and magnetic fields up to 14 T. Based on critical state model, the analysis of the influence of calcium concentration on the critical current was performed. It was found that the change in Ca concentration causes the decrease in value of critical current density j c . The increase in temperature leads to enhancement of the observed effect. At T = 4.2 K and in the magnetic fields higher than 8 T, the j c reduction was found to be insignificant. This fact may indicate the possibility of j c growth in strong magnetic fields due to increase in carrier concentration caused by replacing Y3+ by Ca2+.

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Acknowledgments

Research was supported by Russian Science Foundation (project No14-22-00098).

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Authors and Affiliations

  1. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia

    Igor Rudnev & Alexey Menushenkov

  2. International Laboratory of High Magnetic Field and Low Temperatures, Wroclaw, Poland

    Igor Rudnev & Alexey Menushenkov

  3. SuperOx, Moscow, Russia

    Andrey Blednov, Vsevolod Chepikov & Sergey Samoylenkov

Authors
  1. Igor Rudnev
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  2. Alexey Menushenkov
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  3. Andrey Blednov
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  4. Vsevolod Chepikov
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  5. Sergey Samoylenkov
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Correspondence to Igor Rudnev.

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Rudnev, I., Menushenkov, A., Blednov, A. et al. Magnetization and Critical Current of Calcium-doped YBa2Cu3O7−x Composite Films. J Supercond Nov Magn 29, 645–649 (2016). https://doi.org/10.1007/s10948-015-3294-0

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  • DOI: https://doi.org/10.1007/s10948-015-3294-0

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