Volume 86, Number 5, June 2009
Article Number 50001
Number of page(s) 5
Section General
Published online 11 June 2009
EPL, 86 (2009) 50001
DOI: 10.1209/0295-5075/86/50001

Thermal effects on crackling noise

R. 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