The Lightness of Electrons in a Twisting Metal Crystal

This torque cantilever is used to measure magnetic property of bismuth in intense magnetic fields. The bismuth crystal (5.6 mm tall vertical pillar) is glued to the end of a thin cantilever beam made of gold. Deflections of the cantilever in a field are detected by measuring changes in capacitance. Credit: N. Phuan Ong, Princeton University