Abstract
We present the results of a systematic study of resistance noise near the superconducting transition in granular Al films with sheet resistances R⧠ in the range 500 Ω/⧠<R⧠<9000 Ω/⧠. In all samples we find a sharp peak in the noise magnitude vs temperature at temperatures slightly above the onset of dc resistance. The width of the noise peak is proportional to the width of the resistive transition which in turn scales with R⧠ in qualitative agreement with the predictions of Beasley et. al.1 The noise is interpreted with a shot n oise model as arising from random voltage pulses generated by the motion of free vortices.
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