Critical Exponent of Phase Separation in Metallic Binary Liquids

The first detailed study of the critical exponent of phase separation, ${\beta }_{\mathrm{BM}}$, in a metallic binary liquid is reported. High-precision electrical resistivity measurements made on a Ga-Hg mixture of critical composition allowed the determination of ${\beta }_{\mathrm{BM}}$, which was found to be 0.335 ± 0.005 in the reduced temperature interval ${10}^{-4\mathrm{}}<~\epsilon <~{10}^{-2\mathrm{}}$.