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Effect of an external magnetic field and a trapped magnetic flux on the current-voltage characteristics of a granular high-temperature superconductor YBa2Cu3O7−δ

  • Metals and Superconductors
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Abstract

A comparative study of the current-voltage characteristics of the high-temperature ceramic superconductor YBa2Cu3O∼6.95 at T = 77.3 K is performed over wide ranges of external magnetic fields H ext and “treatment” fields H treat. It is found that the field dependences of the parameters a and j c involved in the exponential equation E = a(j − j c)v describing the current-voltage characteristics depend substantially on the method used for applying the magnetic field, whereas the exponent v ∼ 2 depends on neither the method of application nor on the magnetic field strength. The field dependence of the trapped magnetic field H trap is determined.

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Authors and Affiliations

  1. National Scientific Center “Kharkov Institute of Physics and Technology,”, National Academy of Sciences of Ukraine, ul. Akademicheskaya 1, Kharkov, 61108, Ukraine

    V. V. Derevyanko, T. V. Sukhareva & V. A. Finkel’

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  1. V. V. Derevyanko
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  2. T. V. Sukhareva
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  3. V. A. Finkel’
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Original Russian Text © V.V. Derevyanko, T.V. Sukhareva, V.A. Finkel’, 2006, published in Fizika Tverdogo Tela, 2006, Vol. 48, No. 8, pp. 1374–1379.

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Derevyanko, V.V., Sukhareva, T.V. & Finkel’, V.A. Effect of an external magnetic field and a trapped magnetic flux on the current-voltage characteristics of a granular high-temperature superconductor YBa2Cu3O7−δ . Phys. Solid State 48, 1455–1460 (2006). https://doi.org/10.1134/S1063783406080051

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  • DOI: https://doi.org/10.1134/S1063783406080051

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