Domain wall superconductivity in hybrid superconductor -- ferromagnetic structures

Details Domain wall superconductivity in hybrid superconductor -- ferromagnetic structures Domain wall superconductivity in hybrid superconductor -- ferromagnetic structures

2003-05-22

arxiv.org/abs/cond-mat/0305520v1

Phys. Rev. B 68, 184508 (2003)

Physics

Condensed Matter

Superconductivity

10 pages, 8 figures. Submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.184508

On the basis of phenomenological Ginzburg-Landau approach we investigate the problem of order parameter nucleation in hybrid superconductor/ferromagnetic systems with a domain structure in applied external magnetic field. Both the isolated domain boundaries and periodic domain structures in ferromagnetic layers are considered. We study the interplay between the superconductivity localized at the domain walls and far from the walls and show that such interplay determines a peculiar field dependence of the critical temperature Tc. For a periodic domain structure the behavior of the upper critical field of superconductivity nucleation near Tc is strongly influenced by the overlapping of the superconducting nuclei localized over different domains.

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