Ab initiotheory of perpendicular magnetotransport in metallic multilayers
- 1 December 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 62 (22), 15084-15095
- https://doi.org/10.1103/physrevb.62.15084
Abstract
The current-perpendicular-to-plane (CPP) magnetotransport of a metallic sample sandwiched by two ideal leads is described at an ab initio level. The so-called “active” part of the system is either a trilayer consisting of two magnetic slabs of finite thickness separated by a nonmagnetic spacer or a multilayer formed by alternating magnetic and nonmagnetic layers. We use a transmission matrix formulation of the conductance based on surface Green’s functions as formulated by means of the tight-binding linear muffin-tin orbital method. The formalism is extended to the case of lateral supercells with random arrangements of atoms of two types, which in turn allows to deal with specular and diffusive scattering on equal footing, and which is applicable also to the case of noncollinear alignments of the magnetization in the layers. Applications refer to fcc-based Co/Cu/Co(001) trilayers and multilayers, considering in detail the effect of substitutional alloying in the spacer and in the magnetic layers, as well as interdiffusion at the interfaces.Keywords
This publication has 30 references indexed in Scilit:
- Microscopic mechanisms of giant magnetoresistancePhysical Review B, 1999
- Ab initiocalculations of magnetotransport for magnetic multilayersPhysical Review B, 1999
- Influence of disorder on the perpendicular magnetoresistance of magnetic multilayersJournal of Magnetism and Magnetic Materials, 1999
- Ballistic transport and electronic structurePhysical Review B, 1998
- Perpendicular giant magnetoresistance of magnetic multilayersAdvances in Physics, 1997
- Ab InitioCalculations of the Giant MagnetoresistancePhysical Review Letters, 1995
- Electronic Transport in Mesoscopic SystemsPublished by Cambridge University Press (CUP) ,1995
- Perpendicular giant magnetoresistances of Ag/Co multilayersPhysical Review Letters, 1991
- Enhanced magnetoresistance in layered magnetic structures with antiferromagnetic interlayer exchangePhysical Review B, 1989
- Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic SuperlatticesPhysical Review Letters, 1988