J. Phys. IV France
Volume 123, March 2005
Page(s) 145 - 149

J. Phys. IV France 123 (2005) 145-149

DOI: 10.1051/jp4:2005123024

Ag injection to Bi2Sr2CaCu2Oy superconductor by shock-loading

M. 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$_{\rm y}$ 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$_{\rm y}$ 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 $^{\circ}$C for 12 hs in N2 after shock loading. The $\Delta $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.

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