The Labusch Parameter of a Driven Flux Line Lattice in YBa$_2$Cu$_3$O$_7$ Superconducting Films

Details The Labusch Parameter of a Driven Flux Line Lattice in YBa$_2$Cu$_3$O$_7$ Superconducting Films The Labusch Parameter of a Driven Flux Line Lattice in YBa$_2$Cu$_3$O$_7$ Superconducting Films

2000-05-25

arxiv.org/abs/cond-mat/0005440v1

Physics

Condensed Matter

Superconductivity

4 Figures

Scientific paper

10.1007/s100510070119

We have investigated the influence of a driving force on the elastic coupling (Labusch parameter) of the field-cooled state of the flux line lattice (FLL) in 400 nm thick YBa$_2$Cu$_3$O$_7$ superconducting films. We found that the FLL of a field-cooled state without driving forces is not in an equilibrium state. Results obtained for magnetic fields applied at $0^\circ$ and 30$^\circ$ relative to CuO$_2$ planes, show an enhancement of the elastic coupling of the films at driving current densities several orders of magnitude smaller than the critical one. Our results indicate that the FLL appears to be in a relatively ordered, metastable state after field cooling without driving forces.

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