19 research outputs found
Turbulent relaxation in the vortex lattice
The time dependence of flux patterns of an untwinned YBa2Cu3O single crystal
showing the “meandering instability” is observed at using
magneto-optical imaging. When applying a reversed external field to a
remanent
state, along the front of penetrating antivortices, flux droplets are
formed which can separate from the flux front and move in a spiral-like
fashion. It is shown that the vortices along the flux front are in fast
motion. These observations are discussed using a newly developed theory.
Furthermore, the flux patterns are analyzed in terms of flux creep