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Effects of Size, deGennes and Ginzburg–Landau Parameters on the Magnetic Susceptibility of an Isotropic Superconductor

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Abstract

The magnetic signature of a nanoscopic superconductor immersed in a magnetic applied field \(H_e\) is calculated numerically. The calculated magnetic susceptibility \(\partial M / \partial H_e\) of a superconducting nanoprism shows discontinuities and a quasiperiodic modulation at the vortex transition fields \(H_\mathrm{T}\) (fields for which one or several vortices enter/leave the sample). In this contribution, we studied the influence of the sample size, the Ginzburg–Landau parameter \(\kappa \) and the deGennes parameter b on the magnetic susceptibility in a type-II isotropic superconductor. We found distinct signatures of the magnetic susceptibility when superconducting samples of two and three dimensions are considered.

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Acknowledgments

The authors would like to thank Edson Sardella for his very useful discussions, this work was partially financed by the Universidad del Magdalena (Fonciencias) and the Colombian Agency Colciencias through doctoral scholarships 567.

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Authors and Affiliations

  1. Departamento de Física, Universidad Nacional de Colombia, Bogotá, Colombia

    C. A. Aguirre & J. Barba-Ortega

  2. Facultad de Ingeniería, Universidad del Magdalena, Santa Marta, Colombia

    J. D. González

Authors
  1. C. A. Aguirre
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  2. J. D. González
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  3. J. Barba-Ortega
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Correspondence to J. Barba-Ortega.

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Aguirre, C.A., González, J.D. & Barba-Ortega, J. Effects of Size, deGennes and Ginzburg–Landau Parameters on the Magnetic Susceptibility of an Isotropic Superconductor. J Low Temp Phys 182, 51–60 (2016). https://doi.org/10.1007/s10909-015-1356-0

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  • DOI: https://doi.org/10.1007/s10909-015-1356-0

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