Journal article
Self-organization of domain growth in the Ising model with impurities
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.
Language: | English |
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Year: | 1992 |
Pages: | R5331-R5334 |
ISSN: | 10941622 , 24699926 and 10502947 |
Types: | Journal article |
DOI: | 10.1103/PhysRevA.45.R5331 |