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

Abstract

Specific heat of (La_0.925Ca_0.075)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 T _c (∼18 K). The electronic specific heat coefficient γ value, estimated from the discontinuity ΔC, was about 20 mJ/(mol·K²).