Inelastic scattering in ferromagnetic and antiferromagnetic metal spintronics

Details Inelastic scattering in ferromagnetic and antiferromagnetic metal spintronics Inelastic scattering in ferromagnetic and antiferromagnetic metal spintronics

2006-10-16

arxiv.org/abs/cond-mat/0610417v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 7 figures

Scientific paper

10.1103/PhysRevB.75.014433

We use a ferromagnetic voltage probe model to study the influence of inelastic scattering on giant magnetoresistance and current-induced torques in ferromagnetic and antiferromagnetic metal spin valves. The model is based on the Green's function formulation of transport theory and represents spin-dependent and spin-independent inelastic scatterers by interior voltage probes that are constrained to carry respectively no charge current and no spin or charge current. We find that giant magnetoresistance and spin transfer torques in ferromagnetic metal spin valve structures survive arbitrarily strong spin-independent inelastic scattering, while the recently predicted analogous phenomena in antiferromagnetic metal spin valves are partially suppressed. We use toy-model numerical calculations to estimate spacer layer thickness requirements for room temperature operation of antiferromagnetic metal spin valves.

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