Fig. 9From: Magnetic Properties of Cluster Glassy Ni/NiO Core–Shell Nanoparticles: an Investigation of Their Static and Dynamic Magnetization a–e Linear plot of ln W(t) vs. ln t at 2 K with various mean sizes. The solid straight line shows the fit using stretched exponential function. f Two-dimensional plot of cooling field against the mean size < d>, while different colors are used to differentiate the values of n. The value of n is crucial with n ~ 0 for dilute systems of mono-dispersed nanoparticles, n ~ 2/3 for dilute systems of poly-dispersed nanoparticles, and n ≥ 1 for dense systemsBack to article page