# Onset of long-range diffusion and exponent of 1/f \alpha noise in metal films with electromigration damage

Kar, Swastik and Raychaudhuri, AK (2002) Onset of long-range diffusion and exponent of 1/f \alpha noise in metal films with electromigration damage. In: Applied Physics Letters, 81 (27). pp. 5165-5167.

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Investigations of low-frequency conductance fluctuations have been done on silver films which have been made to undergo electromigration damage. The system shows a clear increase in noise magnitude after electromigration damage. The noise spectral power shows a distinct presence of $1/f^3^/^2$ component arising out of long-range diffusion. The temperature dependence of noise (150 K<T<350 K) shows a marked deviation from the Dutta-Horn type behavior with the $1/f^3^/^2$ term showing a strong dominance at higher temperatures. We propose that the increase of noise in metal films after electromigration damage arise predominantly from this spectral component.