Abstract
By applying a highly sensitive homemade AC susceptibility technique to Pr x Y1 − x Ba2Cu3O7 − δ polycrystals (with x = 0.0, 0.1, and 0.3), we observed very sharp Fraunhofer type low-field periodic oscillations of the real part of the AC susceptibility which were attributed to Josephson vortices penetrating intergranular regions of grain-boundary Josephson network in our samples. Assuming the Lorentz type distribution of single-junction contact areas, we were able to successfully fit the experimental data.
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Rivera, V.A.G., Sergeenkov, S., Stari, C. et al. Unusually strong coherent response from grain-boundary Josephson network in polycrystalline Pr x Y1 − x Ba2Cu3O7 − δ . Jetp Lett. 90, 365–369 (2009). https://doi.org/10.1134/S0021364009170111
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DOI: https://doi.org/10.1134/S0021364009170111