Self-organization of domain growth in the Ising model with impurities

Jørgen Vitting Andersen, Ole G. Mouritsen

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Abstract

We have studied avalanchelike rearrangements of domain patterns in the two-dimensional Ising model with static impurities, which is quenched to low temperatures. When breaking the up-down symmetry of the spins by a small applied field, the mere fluctuation of a single spin eventually results in a cascade of spin flips at the domain boundaries. We have analyzed the lifetime and size distribution functions for the avalanches and related the results to the general phenomena of self-organized criticality and to recent experiments on cellular magnetic domain patterns in magnetic garnet films. Our results suggest that the self-organized state in this system appears to be subcritical, in agreement with a recent theory.
Original languageEnglish
JournalPhysical Review A
Volume45
Issue number8
Pages (from-to)R5331-R5334
ISSN2469-9926
DOIs
Publication statusPublished - 1992

Bibliographical note

Copyright (1992) by the American Physical Society.

Keywords

  • CRITICALITY
  • 1/F NOISE

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