Figure 3
(a) Simulated magnetization versus applied field data for 5.0, 6.7 and 9.2 nm particles. Each curve is the result of an average of 20 different particle configurations in 20 orientations each. 8000 Monte Carlo steps were used for each field step of 0.1 T. (b) Magnetization ratios of curves obtained for particles with APBs and those without, shown as a function of the particle diameter for different applied fields. The black line corresponds to an approximation by equation (8) with t = 0.33 nm. |