Specific heat of CuMn at the spin-glass freezing temperature

The rate of spin-glass entropy increase on heating begins to diminish in the region of the spin-glass freezing temperature ($T_f$). This is seen most clearly in a plot of (spin-glass specific heat divided by temperature) versus temperature. The spin-glass entropy gained on heating from absolute zero to $T_f$ is roughly equal to that found above $T_f$. This general behavior has been found for compositions in the range 0.083 to 0.88 at.% Mn.