Specific-Heat Anomaly of a Metallic Binary Liquid with Miscibility Gap

Abstract

An anomaly in the specific heat $c_p$ of liquid Ga-Hg near the critical point of phase separation is observed and found to resemble that measured in nonmetallic binary systems. The singular part of $c_p$ has a temperature dependence $c_p\approx {\left[\frac{(T-T_c)}{T_c}\right]}^{-\alpha }={\epsilon }^{-\alpha }$, with $\alpha =0.3\mathrm{}\pm 0.1$ in the reduced temperature interval $5\times {10}^5<\epsilon <2\mathrm{}\times {10}^{-2\mathrm{}}$.