Thermal effects on crackling noiseR. A. White, Y. Liu and K. A. Dahmen
Department of Physics, University of Illinois at Urbana-Champaign - Urbana, IL 61801, USA
received 3 January 2009; accepted in final form 13 May 2009; published June 2009
published online 11 June 2009
We present a systematic study of thermal effects on crackling noise. We identify three different scaling regimes in the power spectra, and give explicit expressions for the corner frequencies separating the different regimes. We show a new low-frequency regime arising from hierarchical dynamics induced by the finite temperature and show that our predictions are universal and apply to generic crackling systems. We suggest that thermal effects are responsible for several ubiquitous, yet unexplained, behavior in a number of crackling systems.
05.40.Ca - Noise.
75.60.Ej - Magnetization curves, hysteresis, Barkhausen and related effects.
64.60.Ht - Dynamic critical phenomena.
© EPLA 2009