Temperature dependent asymmetry of the nonlocal spin-injection resistance: evidence for spin non-conserving interface scattering

Abstract

We report nonlocal spin injection and detection experiments on mesoscopic Co-Al2O3-Cu spin valves. We have observed a temperature dependent asymmetry in the nonlocal resistance between parallel and antiparallel configurations of the magnetic injector and detector. This strongly supports the existence of a nonequilibrium resistance that depends on the relative orientation of the detector magnetization and the nonequilibrium magnetization in the normal metal providing evidence for increasing interface spin scattering with temperature.

5 pages, 4 figures, accepted for publication in PRL, minor corrections (affiliation, acknowledgements, typo)

References in corpus (8)

• Spintronics: Fundamentals and applications
• Spin Injection and Detection in Magnetic Nanostructures
• Spin-polarized transport in inhomogeneous magnetic semiconductors: theory of magnetic/nonmagnetic p-n junctions
• Diffusion theory of spin injection through resistive contacts
• Spin transport in interacting quantum wires and carbon nanotubes
• Spin Injection into a Luttinger Liquid
• Spin Bottlenecks in the Quantum Hall Regim
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