Dynamic magnetic forces in superconducting ceramics
- 1 December 1989
- journal article
- letter
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 66 (11) , 5643-5645
- https://doi.org/10.1063/1.343677
Abstract
Dynamic forces between small permanent magnets and bulk high‐Tc superconducting ceramic materials have been measured, including magnetic stiffness and damping effects. The vibration frequencies and the related magnetic stiffness show a large dependence on the magnet‐superconductor distance. The dynamic magnetic stiffness is shown to be related to small static reversible magnetic forces, but is not correlated with the static hysteretic forces. The magnetic damping is inversely related to the magnet‐superconductor distance and can critically damp the oscillations at small gaps. These data also show that the flux pinning forces depend on the prior flux history in the superconductor.This publication has 3 references indexed in Scilit:
- Equilibrium of a magnet floating above a superconducting diskApplied Physics Letters, 1988
- Levitation of a magnet over a flat type II superconductorJournal of Applied Physics, 1988
- Heterojunction acoustic charge transport devices on GaAsApplied Physics Letters, 1988