Distinguish Different Factors Dominating Superconductivity in Y-Doped Bi2Sr2CaCu2Oy
Chin. Phys. Lett. 1996, 13 (2):
We observed in Y-doped Bi2Sr2CaCu2Oy superconductors an interesting phenomenon, the Tc(onset) of the Y-doped samples is higher, but the Tc (end) is lower than that of Y-free samples. After annealing in N2 atmosphere, the Tc (end) is increased, but the Tc (onset) is hardly changed. After careful studying, by structure analysis, x-ray photoelectron spectroscopy, R - T relationship measurement, and Hall effect, we successfully distinguish the different factors that dominate the superconductivity. of which one is carrier concentration, others may possibly be structure change and charges redistribution.