Abstract
Abstract Two samples of single phase thallium-calcium-barium-copper-oxide were prepared using a precursor matrix technique. The resistivity of these samples was determined from 300 K to the temperature of zero resistance, Tzero, using the Montgomery technique. The room temperature resistivity of sample 2 was approximately seven times the room temperature resistivity of sample 1. From these measurements it was found that the temperature dependence of the fluctuation-induced excess conductivity in both the samples was in agreement with the Aslamazov-Larkin expression for three dimensional fluctuations.
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