Avalanches, Barkhausen noise, and plain old criticality

Olga Perković, Karin Dahmen, James P. Sethna

Research output: Contribution to journalArticlepeer-review

Abstract

We explain Barkhausen noise in magnetic systems in terms of avalanches of domains near a plain old critical point in the hysteretic zero-temperature random-field Ising model. The avalanche size distribution has a universal scaling function, making nontrivial predictions of the shape of the distribution up to 50% above the critical point, where two decades of scaling are still observed. We simulate systems with up to 10003 domains, extract critical exponents in 2, 3, 4, and 5 dimensions, compare with our 2D and 6 - ε predictions, and compare to a variety of experiments.

Original languageEnglish (US)
Pages (from-to)4528-4531
Number of pages4
JournalPhysical review letters
Volume75
Issue number24
DOIs
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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