They are clips with the thickness of conventional laminates but with no dielectric coating. I'd like to use the skin effect and gravity (earth's) to removal either lead or zinc "sub masses" without melting the entire lower melting metals and staying beneath the Curie point of spring steel, also a nicety.
An accurate permeability will tighten up the proof of concept.
A measurement of power consumption, mainly of the spring steel (?) via an inductor wrapped about it could not only melt the sub mass but determine the element melted?
Quick design parameters hysteresis core losses are 2/3 the total power ohmic losses of polyamide enameled copper #60 are 1/3.