Inverse proximity effect in superconductor-ferromagnet bilayer structures

Details Inverse proximity effect in superconductor-ferromagnet bilayer structures Inverse proximity effect in superconductor-ferromagnet bilayer structures

2008-10-15

arxiv.org/abs/0810.2605v1

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.102.087004

Measurements of the polar Kerr effect using a zero-area-loop Sagnac magnetometer on Pb/Ni and Al/(Co-Pd) proximity-effect bilayers show unambiguous evidence for the "inverse proximity effect," in which the ferromagnet (F) induces a finite magnetization in the superconducting (S) layer. To avoid probing the magnetic effects in the ferromagnet, the superconducting layer was prepared much thicker than the light's optical penetration depth. The sign and size of the effect, as well as its temperature dependence agree with recent predictions by Bergeret et al..

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