We employ the spin absorption technique in lateral spin valves to extract the spin diffusion length of Permalloy (Py) as a function of temperature and resistivity. A linear dependence of the spin diffusion length with the conductivity of Py is observed, evidencing that the Elliott-Yafet mechanism is the dominant spin relaxation mechanism in Permalloy. Completing the dataset with additional data found in the literature, we obtain λPy = (0.91 ± 0.04) (fΩm2)/ρPy.
Spin diffusion length of Permalloy using spin absorption in lateral spin valves
Edurne Sagasta, Yasutomo Omori, Miren Isasa, YoshiChika Otani, Luis E. Hueso, Fèlix Casanova; Spin diffusion length of Permalloy using spin absorption in lateral spin valves. Appl. Phys. Lett. 21 August 2017; 111 (8): 082407. https://doi.org/10.1063/1.4990652
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