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

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 language	English
Article number	212403
Pages (from-to)	1-4
Number of pages	4
Journal	Physical Review B
Volume	66
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.66.212403
Publication status	Published - 1 Jan 2002

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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.",

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AU - Swagten, H.J.M.

AU - de Jonge, W. J.M.

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AB - 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.

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

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