Peak effect in a superconducting DyBa2Cu3O7-y film at microwave frequencies

Details Peak effect in a superconducting DyBa2Cu3O7-y film at microwave frequencies Peak effect in a superconducting DyBa2Cu3O7-y film at microwave frequencies

2001-02-11

arxiv.org/abs/cond-mat/0102192v1

Physics

Condensed Matter

Superconductivity

1 text, 4 figures (all postscript) to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.63.180502

We report the observation of a peak in the microwave (9.55 GHz) surface resistance in an epitaxial DyBa2Cu3O7-y superconducting film in magnetic fields (parallel to the c axis) ranging between 0.2 to 0.9 Tesla. Such a peak is absent in the measurements done in zero-field. The temperature and field dependence of the peak suggests that this peak could be associated with the peak effect phenomenon reflecting the order-disorder transformation in the flux-line lattice. A strong dependence of this peak effect at frequencies close to the depinning frequency of the flux line lattice is observed.

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