Self-Organized Criticality and the Barkhausen Effect in Amorphous and Polycrystalline Metals
Abstract
An investigation of the possibility that the Barkhausen effect in amorphous and polycrystalline ferromagnets is an example of self-organized criticality is described. Since the theory of self-organized criticality was introduced by Bak Tang, and Weisenfeld to explain the behavior of spatially extended, dissipative dynamical systems, the Barkhausen effect is a natural candidate for such a description. The data are consistent with self-organized critical behavior: the power spectral densities depend on frequency f as l/f(a) and the distribution of pulse energies are well described by a power law analogous to the Gutenberg-Richter law for earthquakes. Alternative explanations for power-law dependences are also presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1993
- Accession Number
- ADA269817
Entities
People
- Lawrence V. Meisel
- Paul J. Cote
Organizations
- United States Army Armament Research, Development and Engineering Center