Effects of Electron Irradiation on the Structural Change in Oriented (Bi_<0.75>Pb_<0.25>)_2Sr_2Ca_2Cu_3O_<10> Superconductors

概要

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Oriented sintered (Bi_<0.75>Pb_<0.25>)_2Sr_2Ca_2Cu_3O<10> pellets have been irradiated up to 2×10^<18>/cm^2 with 3 MeV electrons at 370 K. By X-ray line broadening analyses, the amount of disordered portion in the c-axis direction increased by about 20% on irradiation of 2×10^<18>/cm^2. The intensity of Ca LMM Auger electrons decreased with increasing irradiation. The transition temperature onset remained unchanged at 110.1 K by irradiation, while the transition temperature offset decreased from 101.2 K to 94.7 K at the maximum irradiation dose. The above observations have been explained by the formation of the disordered portion in the grain surface by electron irradiation, which results in the reduction of the superconducting grain connection.
社団法人応用物理学会の論文
1991-07-15