Effect of Blocking and Superconducting Layer Doping on the Superconductivity and Magnetic Properties of Polycrystalline Sr2CaCu2O6

A. Sklyarova*, S. Shinoda, T. Nagumo, V. I. Chizhik, V. V. Matveev, J. Lindén, R. Pohjonen, T. Suzuki, T. Nakayama, H. Suematsu

*Korresponderande författare för detta arbete

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    Sammanfattning

    The possible difference in the properties upon doping the Sr2CaCu2O6 superconducting or blocking layers with Fe and Eu respectively was investigated in this work. The homogeneous Sr2−yEuyCaCu2O6+δ and Sr2CaCu2−xFexO6+δ (y = 0, 0.1, 0.5, x = 0, 0.05) compounds were produced by a high-pressure synthesis route. Judging by the magnetic susceptibility measurements, all samples exhibit a superconductivity transition and the Eu/Fe concentration dependencies on the diamagnetic moment and average Tc have been constructed using the experimental data. As a result, an unusual behavior of the Tc value was observed for the samples with doped Eu: a fivefold reduction in the europium concentration in the sample does not give a noticeable effect on the transition temperature value while the diamagnetic signal becomes more stronger. Complex superconducting dome was found for Eu-doped material: 0.1 ≤ y ≤ 0.5 region Tc vs. concentration data were approximated by inverted parabola-like curve with a maximum at y = 0.3. Difference in properties of the Eu and Fe-doped samples was also found in the behavior of the hysteresis loops showed the opposite orientations.

    OriginalspråkEngelska
    Sidor (från-till)2711-2717
    Antal sidor7
    TidskriftJournal of Superconductivity and Novel Magnetism
    Volym31
    Utgåva9
    DOI
    StatusPublicerad - 1 sep 2018
    MoE-publikationstypA1 Tidskriftsartikel-refererad

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