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Surface spin flip probability of mesoscopic Ag wires
G Mihajlović1, J E Pearson, S D Bader
1Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. goran.mihajlovic@hitachigst.com
Abstract:
Spin relaxation in mesoscopic Ag wires in the diffusive transport regime is studied via nonlocal spin valve and Hanle effect measurements performed on Permalloy/Ag lateral spin valves. The ratio between momentum and spin relaxation times is not constant at low temperatures. This can be explained with the Elliott-Yafet spin relaxation mechanism by considering the momentum surface relaxation time as being temperature dependent. We present a model to separately determine spin flip probabilities for phonon, impurity and surface scattering and find that the spin flip probability is highest for surface scattering.
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