Non-contact conductivity measurement

A method for analyzing a material-under-test, comprising:

• levitating a free-floating magnet between a material-under-test, a diamagnet mounted to a support structure, and a mounted magnet, such that the diamagnet is positioned between the mounted magnet and the free-floating magnet;
• rotating the free-floating magnet in a physically separated manner with respect to the material-under-test;
• measuring a rotation rate of the free-floating magnet over time with a rotation detection assembly based on measuring a reflection of a laser beam projected toward the free-floating magnet, the rotation rate increasing or decreasing based on a drag torque effect of the material-under-test on the free-floating magnet;
• and
• calculating, via a conductivity calculation unit in electrical communication with the rotation detection assembly, at least one of a conductivity and resistivity of the material-under-test based on the measured rotation rate of the free-floating magnet over time.