The Magnetic Susceptibility and Its Temperature Dependence of Liquid Hg–Tl and Hg–Cs Alloys

Abstract

The molar magnetic susceptibility χ_M of liquid Hg–Tl and Hg–Cs alloys was measured from room temperature to 748 K using the Fraday method. The observed χ_M of liquid Hg–Tl alloys shows positive deviations from the linear concentration dependence. For liquid Hg–Cs alloys a positively enhanced tendency of χ_M is found around 40 at.%Cs, though deviations from the linear law remain to be negative as a whole (“W shape”). Such a concentration dependence of χ_M is discussed in terms of the nearly free electron model. Positive deviations or positively enhanced tendencies (“W shape”) of χ_M in these liquid Hg alloys seem to be explained by taking into account electron-ion interactions. The temperature coefficient of χ_M, or dχ_M⁄dT, is discussed from the point of view of higher order ion-ion correlation effects recently found for some liquid mercury alloys.