Flux line depinning in a magnet-superconductor levitation system

A. N. Terentiev, J. R. Hull, L. E. De Long

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The AC loss characteristics of a magnet-superconductor system were studied with the magnet fixed to the free end of an oscillating cantilever located near a stationary melt-textured YBCO pellet. Below a threshold AC field amplitude ≈2 Oe, the dissipation of the oscillator is amplitude-independent, characteristic of a linear, non-hysteretic regime. Above threshold, dissipation increases with amplitude, reflecting the depinning and hysteretic motion of flux lines. The threshold AC field is an order of magnitude higher than that measured for the same YBCO material via AC susceptometry in a uniform DC magnetic field. A partial lock-in of flux lines between YBCO ab planes is proposed as the mechanism for the substantial increase of the depinning threshold.

Original languageEnglish
Pages (from-to)1289-1290
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 3
StatePublished - 2000

Bibliographical note

Funding Information:
Research at U. Kentucky supported by U.S. DOE Grant #DE-FG02-97ER45653; and research at Argonne supported by U.S. DOE Contract W-31-109Eng-38.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'Flux line depinning in a magnet-superconductor levitation system'. Together they form a unique fingerprint.

Cite this