Origin of spin-polarization decay in point-contact Andreev reflection

C.H. Kant, O. Kurnosikov, A. T. Filip, P. LeClair, H.J.M. Swagten, W. J.M. de Jonge

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Abstract

We have performed point contact Andreev reflection measurements with a view to study the correlation between measured spin polarization and the interface scattering parameter Z extracted from fits of the modified Blonder-Tinkham-Klapwijk model to the conductance-voltage curves of superconductor/ferromagnet point contacts. A simple model describing spin-flip scattering in the interface region identifies (formula presented) as the effective scattering parameter and predicts that the spin polarization decays exponentially with (formula presented) in agreement with experimental data.

Original languageEnglish
Article number212403
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B
Volume66
Issue number21
DOIs
Publication statusPublished - 1 Jan 2002

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