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Domain-Wall Guided Nucleation of Superconductivity in Hybrid Ferromagnet-Superconductor-Ferromagnet Layered Structures

W. Gillijns, A. Yu. Aladyshkin, M. Lange, M. J. Van Bael, V. V. Moshchalkov

DOI 10.1103/PhysRevLett.95.227003 · Physical Review Letters

T1

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Abstract

Domain-wall superconductivity is studied in a superconducting Nb film placed between two ferromagnetic Co/Pd multilayers with perpendicular magnetization. The parameters of top and bottom ferromagnetic films are chosen to provide different coercive fields, so that the magnetic domain structure of the ferromagnets can be selectively controlled. From the dependence of the critical temperature Tc on the applied magnetic field H, we have found evidence for domain-wall superconductivity in this three-layered F/S/F structure for different magnetic domain patterns. The phase boundary, calculated numerically for this structure from the linearized Ginzburg-Landau equation, is in good agreement with the experimental data.

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FormulaReported Tc (K)Pressure (GPa)Type
Nb

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4.78Pressure not reportedmidpoint

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