The Mn3Si2Te6 crystal acts like an electrical spring. Apply a current and a magnetic field, and it stirs up eddy currents — tiny electronic whirlpools. Clusters of these vortices (domains) suddenly reorganize, storing energy and pushing back against changes in the current. Researchers caught this effect using spectroscopy, a technique that picks up electrical signals. During the reorganization, the system briefly becomes more ordered; its entropy (degree of disorder) drops, and in response, a powerful burst of electromotive force arises — a voltage spike. The wild part? This whole “spring” fits in a sample smaller than a grain of rice, yet it produces inductance comparable to a fist-sized coil. No exotic materials or extreme conditions, just room temperature and a simple magnetic field.
A 10-millihenry inductance usually requires a coil the size of a fist. This crystal is smaller than a grain of rice.