J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988Proceedings of the International Conference on Magnetism
|Page(s)||C8-2197 - C8-2198|
J. Phys. Colloques 49 (1988) C8-2197-C8-2198
OXYGEN DEFICIENCY δ AND ITS EFFECT ON Tc IN SUPERCONDUCTING Y1Ba2 Cu3O7-δK. Iguchi, Y. Soga, K. Ando, T. Saito, K. Shinagawa et T. Tsushima
Dept. of Physics, Faculty of Science, Toho University, Funabashi, Chiba 274, Japan
Y3+ ion is substituted with Ca2+ ion in Y1Ba2Cu3O7-δ, where the ionic radii of both ions are almost the same. The substitution does not change the average valence of Cu ion, but the amount of oxygen deficiency δ increases linearly with x up to x = 0.15. Crystal structure, critical temperature Tc, magnetization, δ, electrical resistivity, and Hall effect were measured for the Ca system, and an abrupt increase in Hall mobility µ was observed at δ = 0.56 corresponding to the sharp change of δ there.