Fig. 3. DC and AC magnetic susceptibility measurements. (a) Experimental χ M T(T) and (inset) M(H,T) data (symbols) and simulations (solid lines) for 1 using the Hamiltonian (1) and description in text. (b) χ′′M(T) at zero DC field and (inset) τ vs. 1/T plots of the AC data at zero field (green circles) and DC data (red circles) and Arrhenius treatment for the AC data (dotted line) from 7.5 to 10 K and DC data (dashed line) from 0.45 to 1.5 K. (c) χ′′M(ν) at zero DC field. (d) Cole–Cole plots (χ′′M(ν) vs. χ′M(ν)) showing a single relaxation process with α varying from 0.07 to 0.45 (solid lines are a guide for the eye).
