title: Theory of Spin Loss at Metallic Interfaces.
abstract: Interfacial spin-flip scattering plays an important role in magnetoelectronic devices. Spin loss at metallic interfaces is usually quantified by matching the magnetoresistance data for multilayers to the Valet-Fert model, while treating each interface as a fictitious bulk layer whose thickness is δ times the spin-diffusion length. By employing the properly generalized circuit theory and the scattering matrix approaches, we derive the relation of the parameter δ to the spin-flip transmission and reflection probabilities at an individual interface. It is found that δ is proportional to the square root of the probability of spin-flip scattering. We calculate the spin-flip scattering probabilities for flat and rough Cu/Pd interfaces using the Landauer-Büttiker method based on the first-principles electronic structure and find δ to be in reasonable agreement with experiment.
authors.affiliation: Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
authors.forename: K D
authors.initials: KD
authors.lastname: Belashchenko
authors.affiliation: Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
authors.forename: Alexey A
authors.initials: AA
authors.lastname: Kovalev
authors.affiliation: Department of Physics, Kings College London, Strand, London WC2R 2LS, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: van Schilfgaarde