Mk. Marhas et al., CRITICAL EXPONENT OF THE ELECTRICAL-CONDUCTIVITY IN THE PARACOHERENCEREGION OF A THIN-FILM OF YBA2CU3O7-X, Bulletin of Materials Science, 17(6), 1994, pp. 585-594
Critical exponent of the electrical conductivity in the paracoherence
region (gamma) of the high temperature superconductor YBa2Cu3O7-x (YBC
O) has been estimated for high quality thin film on ZrO2 substrate pre
pared by high pressure oxygen sputtering. High energy ion irradiation
was carried out using 100 MeV O-16(7+) ions at liquid nitrogen to see
the effects of disorder on the value of the exponent. The critical exp
onent from a value of about 2 to 1.62 upon irradiation. Studies were a
lso carried film to see the effect of ageing and annealing.