Magnetic Susceptibilities of Molten Bi–BiI3 Solutions

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Abstract
Magnetic susceptibility measurements were made with a Gouy balance on molten Bi–BiI3 solutions at 450°–600°C over the entire composition range. The susceptibilities were diamagnetic throughout and were found to become less diamagnetic as temperature increased. This temperature dependence varied with concentration of bismuth and was greatest in the 30–70 mole % Bi solutions. The molar susceptibility as a function of mole fraction of bismuth showed slight deviations from simple additivity in a diamagnetic direction in the salt‐rich region and larger deviations from additivity in a paramagnetic direction in the metal‐rich melts. This magnetic behavior is discussed in terms of possible chemical species as well as the free‐electron model.