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

A. Yaouanc·P. Dalmas de Reotier·E. H. Brandt
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Abstract

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 $κ$. 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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A. Yaouanc, P. Dalmas de Reotier, E. H. Brandt. 1997-04-18. Effect of the vortex core on the magnetic field in hard superconductors. https://doi.org/10.1103/physrevb.55.11107

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