On the possibility of a long range proximity effect in a ferromagnetic nanoparticle

Details On the possibility of a long range proximity effect in a ferromagnetic nanoparticle On the possibility of a long range proximity effect in a ferromagnetic nanoparticle

2009-03-15

arxiv.org/abs/0903.2613v1

Phys. Rev. B 79, 184505 (2009)

Physics

Condensed Matter

Superconductivity

Scientific paper

We study the proximity effect in a ferromagnetic nanoparticle having a vortex magnetization pattern. We show that for axisymmetric system consisting of a circular particle and a magnetic vortex situated at the center of it no long range superconducting correlations are induced. It means that induced superconductivity is localized in the small area near the superconducting electrode. However, in the real systems axial symmetry can be broken by either a shift of the magnetic vortex from the origin or geometrical anisotropy of the ferromagnetic particle. In this case a long range proximity effect is possible.

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