Effect of the vortex core on the magnetic field in hard superconductors

Details Effect of the vortex core on the magnetic field in hard superconductors Effect of the vortex core on the magnetic field in hard superconductors

1997-04-18

arxiv.org/abs/cond-mat/9704159v1

Physics

Condensed Matter

Superconductivity

5 pages, 3 PostScript figures, accepted in Phys. Rev. B, 1st May 97

Scientific paper

10.1103/PhysRevB.55.11107

Using approximate analytical and new numerical solutions of the conventional Ginzburg-Landau equations we calculate the small angle neutron scattering cross-section and the variance of the field distribution as measured by muon-spin rotation for superconductors with large Ginzburg-Landau parameter $\kappa$. Our results prove that a proper account of the finite size of the vortex core is important, even at relatively low fields. This finding provides a natural explanation for the recently observed field dependence of the CeRu_2 form factor and of the YBa_2Cu_3O_{6.95} penetration depth.

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