J. Phys. IV France 123 (2005) 145-149
Ag injection to Bi2Sr2CaCu2Oy superconductor by shock-loadingM. Kikuchi1, 2, K. Tsukagoshi1, T. Atou1, E. Ohshima1, H. Faqir1, K. Fukuoka1, T. Nojima3, S. Itou1, K. Watanabe1 and Y. Syono1
1 Institute for Materials Research, Tohoku University, Japan
2 Kansei Fukushi Research Center, Tohoku Fukushi University, Sendai 989-3201, Japan
3 Center for Low Temperature Science, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
The platelet bulk specimen Bi2Sr2CaCu2O sandwiched between Ag disks was shocked to 5 GPa using shock loading method. The shocked specimen showed high orientation to c-axis and consolidation of high density of 95 %. Ag particles of about 10 nm were observed on the surface of Bi2Sr2CaCu2O specimen by TEM. The magnetization of zero field cooling strongly increased and Tc reached to 8 4 K from 74 K by the annealing at 650 C for 12 hs in N2 after shock loading. The M (the difference of FC and ZFC) was enhanced about 50 times than pristine specimen. The introduction of pinning site was discussed in connection with jetting effects of shock wave.
© EDP Sciences 2005