Evidence for superconducting effects on the measured resistivity well above Tc for a type-I bulk metal

A superconducting contribution (T) to the electrical conductivity (T) has been observed at temperatures up to about twice the transition temperature Tc1.17 K for bulk aluminum. The form of (T) is found to be ±[Tc(T-Tc)]n, with ± independent of (T), in agreement with the theory of superconducting fluctuations. However, significant differences from the theory are found, with ± more than two orders of magnitude too large and n34 rather than.