Specific Heat and Superconductivity in (La1-xCax)2CuO4

Specific heat of (La0.925Ca0.075)2CuO4 was measured by the thermal relaxation method both under zero magnetic field and under H=5.7T. The discontinuity in the specific heat C was clearly observed at the superconducting transition temperature Tc (~18 K). The electronic specific heat coefficient γ value, estimated from the discontinuity ΔC, was about 20 mJ/(molK2).