250 300 350 400 0 2000 4000 6000 8000 ferrimagnetic Mn$_{0.5}$Ru$_{0.5}$Co$_{2}$O$_{4}$ sample χ -1 dc  (g Oe/emu) χ -1 dc  (g Oe/emu) T (K) 0 100 200 300 0 5000 10000 15000 20000 bulk LCMN ferromagnetic sample T (K) Fig. 2 (Colour online) Inverse of dc susceptibility vs. temperature data of bulk LCMN sample (left-bottom axis)  and RuMn sample (right-top axis) are fitted with equation 1 (red line) and equation 2 (blue line), respectively.