Journal
JOURNAL OF APPLIED PHYSICS
Volume 117, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4922247
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Funding
- European Union 7th Framework Programme under the Marie Curie Actions [256470-ITAMOSCINOM]
- European Research Council [257654-SPINTROS]
- Spanish MINECO [MAT2012-37638]
- Basque Government [BFI-2010-163]
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We use lateral spin valves with varying interface resistance to measure non-local Hanle effect in order to extract the spin-diffusion length of the non-magnetic channel. A general expression that describes spin injection and transport, taking into account the influence of the interface resistance, is used to fit our results. Whereas the fitted spin-diffusion length value is in agreement with the one obtained from standard non-local measurements in the case of a finite interface resistance, in the case of transparent contacts a clear disagreement is observed. The use of a corrected expression, recently proposed to account for the anisotropy of the spin absorption at the ferromagnetic electrodes, still yields a deviation of the fitted spin-diffusion length which increases for shorter channel distances. This deviation shows how sensitive the non-local Hanle fittings are, evidencing the complexity of obtaining spin transport information from such type of measurements. (C) 2015 AIP Publishing LLC.
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