Low-temperature heat capacity upon the transition from paramagnetic to ferromagnetic Heusler alloys Fe$_{2}Me$Al ($Me$ = Ti, V, Cr, Mn, Fe, Co, Ni)

The heat capacity of band magnets Fe$_{2}Me$Al ($Me$ = Ti, V, Cr, Mn, Fe, Co, Ni) ordered in crystal structure $L2_1$ has been measured in the range 2 K $\le T\le$ 50 K. The dependences of the Debye temperature $\Theta_{\mathrm{D}}$, the Sommerfeld coefficient $\gamma$, and the temperature-independent contribution to heat capacity $C_0$ on the number of valence electrons $z$ in the alloys have been determined.