Abstract
Irradiation effects of high-energy particles such as fast neutrons, 28 MeV electrons and 120 MeV oxygen ions were investigated with a fluence giving 10 -4 dpa of Bi2Sr2CaCu2Oy (BSCCO) single crystals. Their critical current densities ( J c) calculated from the magnetization loops were enhanced almost all over the temperature range of 20 to 77 K and the magnetic field range less than 9 T. In comparison with the case of 5.8 GeV lead ion irradiation, they were more similar to each other in magnetic field dependence and in enhancement ratio than that after the lead-ion irradiation. This is attributable to the difference of the size, the shape and the distribution of the radiation defects.
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