Effects of exchange randomness on two-dimensional magnetic domain pattern formation

2次元磁区パターン形成に対する交換相互作用におけるランダムネスの影響

横田 光史   

Yokota, Terufumi

Magnetic domain pattern formation is known to be influenced by structural disorder. We perform numerical simulations using a model of two-dimensional magnetic domain pattern formation focusing on effects of exchange randomness. The model is a scalar model with exchange and dipolar interactions, which includes disorder in the exchange interactions. Morphological change of the patterns with the increase in the disorder is observed. The distribution of the local magnetization becomes broader with the increase of the disorder. For a definite realization of the randomness, many patterns can appear.