Artículos de revistas
Josephson coupling between superconducting clusters in Bi2Sr2CaCu2O8-delta crystals
Registro en:
Europhysics Letters. E D P Sciences, v. 51, n. 2, n. 174, n. 180, 2000.
0295-5075
WOS:000088495200008
Autor
de Lima, OF
Awana, VPS
Ribeiro, RA
Avila, MA
Institución
Resumen
Diamagnetic moments for two Bi2Sr2CaCu2O8+delta crystals were measured at different fields H and temperatures. For the higher fields two distinct transition temperatures T-g and T-J are seen, with T-g > T-J. By increasing H the line T-g(H) shifts very slowly while T-J(H) shifts much faster to lower temperatures, displaying a clear upward curvature well described by a theory based on Josephson coupling between superconducting clusters. We show further that T-J(H) is dependent on sample homogeneity, which is correlated with oxygen distribution in the high-T-c superconductors. 51 2 174 180