SELF-ORGANIZATION OF DOMAIN GROWTH IN THE ISING-MODEL WITH IMPURITIES

被引:6
作者
ANDERSEN, JV [1 ]
MOURITSEN, OG [1 ]
机构
[1] TECH UNIV DENMARK, DEPT PHYS CHEM, DK-2800 LYNGBY, DENMARK
来源
PHYSICAL REVIEW A | 1992年 / 45卷 / 08期
关键词
D O I
10.1103/PhysRevA.45.R5331
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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 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 theoretical predictions.
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页码:R5331 / R5334
页数:4
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