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 domains, extract critical exponents in 2, 3, 4, and 5 dimensions, compare with our 2D and predictions, and compare to a variety of experiments.
- Received 26 June 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.4528
©1995 American Physical Society