Quantum effects in giant magnetoresistance due to interfaces in magnetic sandwichesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:An analytical quantum-statistical theory of giant magnetoresistance (GMR) in magnetic sandwiches for current in-plane geometry (CIP) is developed taking into account quantization of electron motion perpendicular to plane direction and spin-dependent reflection and scattering of conduction electrons at interfaces. We adopted free electron model described by four parameters: mean free paths in the bulk and scattering amplitudes (coherent potentials) at interfaces for spin-up and spin-down electrons. The conductivities and GMR were calculated using Kubo formalism and Green functions technique in mixed real-space-mometum representation. Well-defined oscillations of CIP GR IR with respect to thicknesses of the various layers due to the electron reflection on spin-dependent potential barriers at interfaces are predicted. The relative role of spill-dependent bulk and interfacial scattering and the influence of potential barriers at the interfaces on CIP GMR are investigated. (C) 1998 Elsevier Science B.V. All rights reserved.