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

doi:10.1103/PhysRevB.66.212403

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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

DOI 10.1103/PhysRevB.66.212403 · Physical Review B

T1

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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 Z2 as the effective scattering parameter and predicts that the spin polarization decays exponentially with Z2, in agreement with experimental data.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9.2	Pressure not reported	unknown
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7.2	Pressure not reported	unknown