THERMALLY ACTIVATED DISSIPATION AND CRITICAL-FIELD HC2 IN C-ORIENTED HIGH-TC BI-PB-SR-CA-CU-O THIN-FILM

A set of resistivity-temperature (R-T) curves measured under various applied fields in a high-T(c) Bi-Pb-Sr-Ca-Cu-O thin film which has a zero-resistance temperature T(c0) of 110 K is reported. The remarkable broadening of the transition width is discussed under the flux-creep model, considering the very short coherence length of this oxide superconductor. The resistivity is thermally activated, which is consistent with the Arrhenius law with a magnetic field and orientation-dependent activation energy U0(H, THETA). The U0(H, THETA) has a very high value of 381.6 meV under a field of 0.1 T parallel to the c axis. The upper critical field H(c2) determined from these R-T curves shows high values and the effect of flux creep to the H(c2)(0) is examined by the irreversible behavior with the "giant" flux-creep model.