Probing the degree of spin polarization of a ferromagnet with ferromagnet/superconductor proximity effect
Abstract
Superconductor/ferromagnet proximity effect has been studied for Pb/Co2Cr1-xFexAl bilayers. Different substrate temperatures allowed us to prepare the Heusler alloy Co2Cr1-xFexAl films with different degree of spin polarization of conduction band of the Heusler layer. We obtain a strong correlation between the dependence of the superconducting transition temperature on the Pb-layer thickness at fixed thickness of the Heusler layer and the degree of spin polarization in the ferromagnetic layer.
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