24 March 1999 Influence of irradiation on the magnetic properties of Bi-2212 single crystals
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Measurements of magnetization versus temperature and magnetic field have been performed on single crystals of Bi2Sr2CaCu2Oy irradiated by fast electrons in temperature range from 4.2 K to 80 K and at magnetic field up to 6T. The critical current density under irradiation by fluence of 2 X 1018 cm-2 (E equals 4 MeV) is enhanced by 1.3 times and amounts to 1.3 X 106 Acm-2 at 4.2 K and zero magnetic field (H (parallel) c). At high temperatures the dependence of the irreversibility field Birr(T) is described by linear expression. However, at temperature decreasing Birr increases very abruptly near 20 K - 30 K. For irradiated state the irreversibility line shifts towards higher magnetic fields and Birr changes drastically near 20 - 25 K. The results can be account for by the model of a crossover from 3D to 2D pinning.
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Sergei N. Barilo, Sergei N. Barilo, Valentina I. Gatalskaya, Valentina I. Gatalskaya, Gennadii V. Gatalskii, Gennadii V. Gatalskii, Sergei L. Kurockin, Sergei L. Kurockin, } "Influence of irradiation on the magnetic properties of Bi-2212 single crystals", Proc. SPIE 3724, International Conference on Solid State Crystals '98: Single Crystal Growth, Characterization, and Applications, (24 March 1999); doi: 10.1117/12.343012; https://doi.org/10.1117/12.343012

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