Finite driving rates in interface models of Barkhausen noise

Details Finite driving rates in interface models of Barkhausen noise Finite driving rates in interface models of Barkhausen noise

2001-07-19

arxiv.org/abs/cond-mat/0107411v2

Physical Review E 64, article # 066127 (2001)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 6 figures, RevTeX, final version to be published in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.64.066127

We consider a single-interface model for the description of Barkhausen noise in soft ferromagnetic materials. Previously, the model had been used only in the adiabatic regime of infinitely slow field ramping. We introduce finite driving rates and analyze the scaling of event sizes and durations for different regimes of the driving rate. Coexistence of intermittency, with non-trivial scaling laws, and finite-velocity interface motion is observed for high enough driving rates. Power spectra show a decay $\sim \omega^{-t}$, with $t<2$ for finite driving rates, revealing the influence of the internal structure of avalanches.

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