INSTANTANEOUS CONFIGURATIONS OF THE BLOCH WALLS IN A 2-DIMENSIONAL AND S = 1/2 MODEL

[摘要] We show that instantaneous configurations of 180-degrees domain walls constructed on a square lattice in a two-dimensional and S = 1/2 Ising-type model exhibit fractal structure. The fractal dimension depends on the coupling parameters and it is a continuous function of the temperature. The wall thickness in the neighbourhood of T(c) presents scaling properties in good agreement with the classical theory by Landau.

[发布日期] 1993-08-01