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Temperature-dependent asymmetry of the nonlocal spin-injection resistance: evidence for spin nonconserving interface
Samir Garzon1, Igor Zutić, Richard A Webb
1Department of Physics and Center for Superconductivity Research, University of Maryland, College Park, Maryland 20742, USA.
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.
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