Friction in levitated superconductors
- 17 October 1988
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 53 (16), 1554-1556
- https://doi.org/10.1063/1.100435
Abstract
A type I superconductor levitated above a magnet of low symmetry has a unique equilibrium position about which it may oscillate freely. In contrast, a type II superconductor has a continuous range of stable equilibrium positions and orientations where it floats rigidly without swinging or orbiting as if it were stuck in sand. A strong internal friction conspicuously indicates the existence and unpinning of flux lines in oxide superconductors levitated above liquid nitrogen. It is shown how these effects follow from the hysteretic magnetization curves and how the energy is dissipated.Keywords
This publication has 16 references indexed in Scilit:
- Irreversible magnetic properties of high Tc superconductorsPhysica C: Superconductivity and its Applications, 1988
- Hysteretic levitation forces in superconducting ceramicsApplied Physics Letters, 1988
- Levitation of a magnet over a flat type II superconductorJournal of Applied Physics, 1988
- The Flux‐Line Lattice in Type‐II SuperconductorsPhysica Status Solidi (b), 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- New Results in the Theory of Collective PinningJapanese Journal of Applied Physics, 1987
- Pinning and Critical Currents in Type II SuperconductorsJapanese Journal of Applied Physics, 1987
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986
- Pinning in type II superconductorsJournal of Low Temperature Physics, 1979
- Flux vortices and transport currents in type II superconductorsAdvances in Physics, 1972