Levitation of a magnet over a flat type II superconductor

Journal Article · Fri Jan 15 04:00:00 EST 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.340262· OSTI ID:5741358

Hellman, F; Gyorgy, E M; Johnson, Jr, D W; O'Bryan, H M; Sherwood, R C

Levitation of a magnet over a type II superconductor where the field at the superconductor exceeds H/sub c//sub 1/ is described and shown. The penetration and pinning of the flux lines in the superconductor cause the position of the magnet to be stable over a flat disk; a complete Meissner effect would make this position unstable. Furthermore, the observed dependence of the height of levitation on such variables as the thickness of the superconducting disk and the size of the magnet are consistent with a model described in this paper based on the energy cost of flux penetration through vortices and inconsistent with a Meissner effect model.

• Research Organization: ATandT Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 5741358
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 63:2; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
BORON ALLOYS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
DATA
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
LEVITATION
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETS
MEISSNER-OCHSENFELD EFFECT
NEODYMIUM ALLOYS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PERMANENT MAGNETS
RARE EARTH ALLOYS
SUPERCONDUCTORS
THEORETICAL DATA
TRANSITION ELEMENT COMPOUNDS
TYPE-II SUPERCONDUCTORS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES