Macroscopic Rotors Achieve 10 Hours of Free Spin with Diamagnetic Levitation

Researchers have developed a diamagnetically levitated millimeter-scale rotor capable of 10 hours of free spin at room temperature. Published in Nature Communications, this low-dissipation rotor exhibits a rate as low as 3.85 μHz. The rotor is stably levitated over a permanent magnet trap and can be electrostatically driven up to 930 RPM in a high vacuum, functioning as a highly sensitive gyroscope.