The specific heat of MgB2 was measured at temperatures ranging from 4.5 to 80K. The superconducting anomaly ΔC at TC was clearly observed. The total specific heat in the normal state could be well fitted by electronic and phonon contributions. The Debye temperature θD was found to be 737K, much larger than that of intermetallic superconductors. The normal-state electronic specific heat coefficient, γ, was found to be 2.48mJ/molK2 and ΔC/γTC was between 1.41 and 2.15.

Low-Temperature Specific Heat of Superconducting MgB2. J.L.Luo, J.Zhang, Z.J.Chen, H.Y.Bai, Y.P.Wang, J.B.Meng, D.Jin, Z.A.Ren, G.C.Che, Z.X.Zhao: Chinese Physics Letters, 2001, 18, 820-2