Figure 2
The exponential-like distribution of waiting times. Cumulative distribution function of waiting times \(P(\tau \ge t)\) measured from Barkhausen noise time series recorded in amorphous FeSiB and polycrystalline NiFe ferromagnetic films having thicknesses of 1000, 100, and 50 nm. In particular, here we present 50 representative waiting-time distributions obtained imposing a threshold level of 5 nV, selected from the set of 200 time series analyzed for each sample. Remarkably, the cumulative distribution function of waiting times \(P(\tau \ge t)\) follows a robust exponential behavior, which can be fitted by \(P(\tau \ge t)\propto {e}^{-\tau /\lambda }\), thus providing λ, the characteristic time of the exponential process.
