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Study of magnetic flux pinning in granular YBa2Cu3O7 − y /nanoZrO2 composites

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Abstract

In this work, the effect of ZrO2 nanoparticles prepared in a low-pressure arc discharge plasma on magnetic flux pinning of granular YBa2Cu3O7 − y /nanoZrO2 composites has been studied. It has been shown that the ZrO2 nanoparticles do not change the superconducting transition and the microstructure of superconductors. At a temperature of 5 K, the addition of 0.5 and 1 wt % of ZrO2 nanoparticles may lead to the additional effect of magnetic flux pinning and the increase in the critical current density J c. The J c value for composites with 1 wt % is two times larger than that for the reference sample. The fishtail effect is observed for YBa2Cu3O7 − y /nanoZrO2 composites at the temperatures of 20 and 50 K. The problems associated with the additional effect of magnetic flux pinning of granular YBa2Cu3O7 − y /nanoZrO2 composites and the appearance of the fishtail effect have been discussed.

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Authors and Affiliations

  1. Siberian Federal University, Krasnoyarsk, 660074, Russia

    A. V. Ushakov, I. V. Karpov, A. A. Lepeshev & L. Yu. Fedorov

  2. Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia

    A. A. Lepeshev

  3. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia

    M. I. Petrov

Authors
  1. A. V. Ushakov
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  2. I. V. Karpov
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  3. A. A. Lepeshev
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  4. M. I. Petrov
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  5. L. Yu. Fedorov
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Correspondence to A. V. Ushakov.

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Original Russian Text © A.V. Ushakov, I.V. Karpov, A.A. Lepeshev, M.I. Petrov, L.Yu. Fedorov, 2014, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 99, No. 2, pp. 105–109.

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Ushakov, A.V., Karpov, I.V., Lepeshev, A.A. et al. Study of magnetic flux pinning in granular YBa2Cu3O7 − y /nanoZrO2 composites. Jetp Lett. 99, 99–103 (2014). https://doi.org/10.1134/S002136401402009X

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  • DOI: https://doi.org/10.1134/S002136401402009X

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