Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2008-08-25
Phys. Rev. E 80, 016209 (2009)
Physics
Condensed Matter
Statistical Mechanics
7 pages, 3 figures
Scientific paper
Oscillating fields can make domain patterns change into various types of structures. Numerical simulations show that concentric-ring domain patterns centered at a strong defect are observed under a rapidly oscillating field in some cases. The concentric-ring pattern appears near the threshold of spatially-uniform patterns in high-frequency cases. The threshold is theoretically estimated and the theoretical threshold is in good agreement with numerical one in a high-frequency region. The theoretical analysis gives also good estimations of several characteristics of domain patterns for high-frequencies.
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