An in situ measurement instrument for resistivity of molten metals at high temperature under high magnetic field

This study introduces an experimental platform designed to investigate the electrical transport properties of molten metals at high temperatures under high magnetic fields. The core measurement setup was housed inside a toroidal superconducting magnet. A four-probe method was used for resistance measurements, utilizing a specially designed electrode fixture to mitigate magnetic field interference. The system enabled the simultaneous application of high magnetic fields and high temperatures to the sample while collecting in situ resistance data. Resistivity was subsequently calculated based on Ohm's law. To verify the reliability of the instrument, measurements were performed on molten Pb and Sn. The results demonstrated that the application of a high magnetic field significantly increased the resistivity of both melts, indicating its notable influence on electron scattering and charge transport in molten metals. The successful development of this instrument provides innovative, physics-based fundamental data, offering a valuable experimental tool to advance materials science investigations in high magnetic field environments.