Abstract
We fabricate a large number of nonlocal spin valves with mesoscopic Cu channels. A systematic method is used to extract Cu resistivity and spin relaxation length from each given structure. A relationship between and is established over a broad range of (from 0.7 to ) with data points obtained at 10 and 295 K. Quantitative analysis of the relationship indicates that the spin relaxation can be described by the Elliott-Yafet model with a low spin-flip probability of for bulk scattering and a higher probability of for surface scattering. Encouraging large values of ( at 10 K and at 295 K) are achieved experimentally in structures with low values ( at 10 K and at 295 K).
- Received 17 April 2019
- Revised 27 August 2019
DOI:https://doi.org/10.1103/PhysRevB.100.144419
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