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Inhomogeneous superconductivity induced in a ferromagnet by proximity effect.

Authors
Type
Published Article
Journal
Physical review letters
Publication Date
Volume
86
Issue
2
Pages
304–307
Identifiers
PMID: 11177817
Source
Medline
License
Unknown

Abstract

Planar tunneling spectroscopy reveals damped oscillations of the superconducting order parameter induced into a ferromagnetic thin film by the proximity effect. The oscillations are due to the finite momentum transfer provided for Cooper pairs by the splitting of the spin-up and spin-down bands in the ferromagnet. As a consequence, for negative values of the superconducting order parameter the tunneling spectra are capsized ("pi state"). The oscillations' damping and period are set by the same length scale, which depends on the spin polarization.

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