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Critical state and low-field electrodynamics in LaO0.85F0.15FeAs superconductor polycrystals

  • Order, Disorder, and Phase Transition in Condensed System
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Abstract

The penetration of a weak magnetic field into LaO0.85F0.15FeAs polycrystalline superconductors is investigated using two mutually complementing techniques: measurement of the higher harmonics of nonlinear magnetization and the current-voltage characteristics. The dependences of the critical current density and resistivity on the temperature and magnetic field strength are determined. The results confirm the theory of the critical state in the low-field electrodynamics of a Josephson medium. The universality of this theoretical concept is demonstrated for a new class of ceramic superconductors.

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Authors and Affiliations

  1. Petersburg Institute of Nuclear Physics, National Research Centre “Kurchatov Institute,”, Gatchina, Leningradskaya oblast, 188300, Russia

    O. V. Gerashchenko, A. V. Aldushchenkov & I. S. Okunev

  2. Belarus State University, Minsk, 220030, Republic of Belarus

    A. L. Kholmetskii, V. A. Lomonosov & L. V. Makhnach

  3. Palacky University, Olomouc, 77147, Czech Republic

    M. Mashlan

  4. Okan University, Akfirat Beldesi, Istanbul, 34959, Turkey

    T. Yarman

Authors
  1. O. V. Gerashchenko
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  2. A. L. Kholmetskii
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  3. M. Mashlan
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  4. T. Yarman
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  5. A. V. Aldushchenkov
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  6. I. S. Okunev
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  7. V. A. Lomonosov
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  8. L. V. Makhnach
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Correspondence to O. V. Gerashchenko.

Additional information

Original Russian Text © O.V. Gerashchenko, A.L. Kholmetskii, M. Mashlan, T. Yarman, A.V. Aldushchenkov, I.S. Okunev, V.A. Lomonosov, L.V. Makhnach, 2015, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 147, No. 6, pp. 1196–1203.

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Gerashchenko, O.V., Kholmetskii, A.L., Mashlan, M. et al. Critical state and low-field electrodynamics in LaO0.85F0.15FeAs superconductor polycrystals. J. Exp. Theor. Phys. 120, 1034–1040 (2015). https://doi.org/10.1134/S1063776115060060

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