2020/11/06 by Nabin K. Raut, Jeffery Miller, Raut, N. K. +7
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Geophysics and Sensor Technology #Mechanical and Optical Resonators #Quantum Physics (quant-ph) #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.2011.03144
openalex publication_date 2020/11/06 · openalex created_date 2020/11/23 · openalex updated_date 2026/07/28
We report on the magnetic levitation of a millimeter sized neodymium permanent magnet within the interior of a superconducting radio frequency (SRF) cavity. To the best of our knowledge, this is the first experimental work on levitating a magnet within an SRF cavity. The cavity is a coaxial quarter wave microwave resonator made from 6061 aluminum, having a resonance frequency of 10GHz and a loaded Q of 1400. The cylindrical magnet (N50) has a height of 1 mm, a diameter of 0.75 mm, a mass of 4 mg, and a remanence of 1.44 T. This produces a peak magnetic field 140 times greater than the critical field of aluminum. Our measurements are consistent over several heating and cooling cycles. Our work provides a path towards a novel optomechanical system.