CSC,INST PHYS,NATL LAB SUPERCONDUCT,BEIJING 100080,PEOPLES R CHINA
; ACAD SINICA,INST HIGH ENERGY PHYS,BEIJING 100080,PEOPLES R CHINA
Article; Proceedings Paper
In order to investigate the reason of Jc increment in (RE,Y)-123 superconductors, we prepare Eu-doped (EuxY1-x)-123 ceramic samples with different Eu concentration. Positron lifetime and Doppler-broadening spectrum are simultaneously used to investigated the defects (stress field) verse different Eu-substitution. The experimental results support the stress-field pinning mechanism.