Accession Number : ADA307745

Title :   Self-Organized Critical Behavior in a Domain Wall Dynamics Model Describing Barkhausen Effect.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS

Personal Author(s) : Meisel, L. V.

PDF Url : ADA307745

Report Date : JAN 1996

Pagination or Media Count : 32

Abstract : A simple domain wall dynamical model, incorporating a normal distribution of pinning strengths on a simple cubic lattice of pinning sites, a nearest neighbor elastic interaction, and demagnetization effects with a simple dynamical rule, yields a succession of fractal scaling structures as the applied field is increased. Furthermore, each domain wall configuration in the succession supports size effect cutoff power law distributions of avalanches (i.e., Barkhausen noise pulses) when perturbed. The size effect parameters correlate with the ranges of fractal scaling.

Descriptors :   *EARTH CRUST, *FERROMAGNETISM, *DOMAIN WALLS, FRACTALS, EARTHQUAKES, PINS, AVALANCHE EFFECT(ELECTRONICS), SELF ORGANIZING SYSTEMS, SIMPLE CUBIC LATTICES, DEMAGNETIZATION, FLICKER.

Subject Categories : Geology, Geochemistry and Mineralogy
      Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE