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Influence of the Gd Concentration on Superconducting Properties in Second-Generation High-Temperature Superconducting Wires

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Systematic studies of second-generation high-temperature superconducting wires with Gd excess relative to the stoichiometric GdBa2Cu3O7 composition are reported. It has been revealed that filamentary defects in the form of non-superconducting Gd2CuO4 phase located along the ab plane are formed during film growth. These inclusions lead to a change in the pinning mechanism of the vortex structure, due to which the peak of the critical current at +15% Gd is clearly observed.

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Funding

Magnetic measurements were supported by the Russian Science Foundation (project no. 22-22-00570). Microstructure studies and analysis of the results were supported by the Ministry of Science and Higher Education of the Russian Federation (state assignment no. 075-01129-23-00 for the Joint Institute for High Temperatures, Russian Academy of Sciences).

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Authors and Affiliations

  1. Joint Institute for High Temperatures, Russian Academy of Sciences, 125412, Moscow, Russia

    P. N. Degtyarenko

  2. Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia

    A. V. Sadakov, A. Yu. Degtyarenko, S. Yu. Gavrilkin, O. A. Sobolevskii, A. Yu. Tsvetkov & B. I. Massalimov

  3. National Research Center Kurchatov Institute, 123182, Moscow, Russia

    A. V. Ovcharov

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  1. P. N. Degtyarenko
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  2. A. V. Sadakov
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  3. A. V. Ovcharov
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  4. A. Yu. Degtyarenko
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  5. S. Yu. Gavrilkin
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  7. A. Yu. Tsvetkov
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  8. B. I. Massalimov
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Correspondence to P. N. Degtyarenko.

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Translated by L. Mosina

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Degtyarenko, P.N., Sadakov, A.V., Ovcharov, A.V. et al. Influence of the Gd Concentration on Superconducting Properties in Second-Generation High-Temperature Superconducting Wires. Jetp Lett. 118, 579–584 (2023). https://doi.org/10.1134/S0021364023602671

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  • DOI: https://doi.org/10.1134/S0021364023602671

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