Magnetization of mesoscopic superconducting discs

Details Magnetization of mesoscopic superconducting discs Magnetization of mesoscopic superconducting discs

1997-07-02

arxiv.org/abs/cond-mat/9707018v2

Physics

Condensed Matter

Superconductivity

Some minor corrections and more accurate citation to earlier works. To appear in Phys. Rev. Lett

Scientific paper

Solutions of Ginzburg-Landau eqns. coupled with three dimensional Maxwell eqns. reveal intriguing magnetic response of small superconducting particles, qualitatively different from the two dimensional approximation but in agreement with recent experiments. Depending on the radius and thickness first or second order transitions are found for the normal to superconducting state. For a sufficient large radius of the disc several transitions in the superconducting phase are obtained which correspond to different angular momentum giant vortex states. The incorporation of the finite thickness in the calculation is crucial in order to obtain agreement with the position and the size of these jumps, and the line shape and magnitude of the magnetization curves.

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