Abstract
We have performed a magnetic study of a bulk metallic sample of Nb with critical temperature T c = 8.5 K. Magnetization measurements taken for magnetic fields greater than 1 kOe show a superconducting transition that becomes broader as the field is increased. The data are well described by lowest Landau level (LLL) fluctuation theory. A scaling analysis yields values for the superconducting transition temperature under field T c( H) which are consistent with H c2( T).
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