Abstract
Our study sample is a mesoscopic superconducting three-dimensional parallelepiped immersed in a magnetic field \(H_{z}\). The sample presents an anisotropy of the Ginzburg–Landau parameter \(\kappa (z)\) in the z-axis. This dependence allows us to simulate a superconducting three layer system, where the top and bottom layers are made of a type-II superconducting material, and the middle layer is fabricated of a type-I material. We analyzed the superconducting electron density, free energy, and the magnetization curves as functions of H for different values of \(\kappa (z)\). Due to the effects of proximity and shielding on the borders of the layers, Abrikosov vortices are present in the type I regions, and a fractional vortex state is present in the type II superconducting region.
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Acknowledgements
C .A. Aguirre would like to thank the Brazilian Agency CAPES for financial support and the Ph.D fellowship, grant number 089.229.801-89. Q. M. would like to thank the Brazilian Agency Fapero-CAPES for financial support, grant number 008.
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Aguirre, C.A., Martins, Q.S. & Barba-Ortega, J. Superconducting 3D Multi-layer Sample Simulated Via Nonuniform Ginzburg–Landau Parameter. J Low Temp Phys 202, 360–371 (2021). https://doi.org/10.1007/s10909-020-02557-5
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DOI: https://doi.org/10.1007/s10909-020-02557-5