Behavior of superconducting samples levitated in a static magnetic field Study in a non-vertical configuration
The mechanical response of superconducting samples in a static magnetic field was investigated. Levitation of superconducting YBa 2Cu 3O x samples was performed in an unusual configuration. Undamped oscillations were observed; most of the samples oscillated for times as long as 2 min, but a few of them showed a highly damped behavior. Volume magnetization of samples was estimated from the levitation; the magnetic stiffness was also measured, and we found a dependence on the density. The samples levitated rigidly after oscillating; a discussion in terms of flux pinning is given.