Figure 5
(a) The temperature dependence of magnetic susceptibility χ(T) of polycrystalline Sr2Co3S2O3 at 3 T. The dots represent the observed data, while the solid line and the dashed line are the fitted curves according to the 
dimer model (Eq. 2) and the 
dimer model (Eq. 3), respectively. The inset shows the first derivative of magnetic susceptibility χ′(T) under zero field cooling. (b) The temperature dependence of specific heat Cp(T) of polycrystalline Sr2Co3S2O3 at zero field. The dotted line indicates the Dulong-Petit limit. The inset displays the comparison of the measurements of Cp(T) with increasing and decreasing temperatures around the transition. The dashed line is an estimate of the phononic contribution.
