Spin diffusion length of Permalloy using spin absorption in lateral spin valves

Abstract

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 conductivity of Py is observed, evidencing that Elliott-Yafet is the dominant spin relaxation mechanism in Permalloy. Completing the data set with additional data found in literature, we obtain ${\lambda }_{Py}=(0.91\pm 0.04)(f\Omega m^2)/{\rho }_{Py}$.

arXiv comment8 pages, 4 figures, 2 tables

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• Giant spin Hall angle in the Heusler alloy Weyl ferromagnet Co${}_2$MnGa
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• Calculating spin transport properties from first principles: spin currents
• Anomalous Hall-like transverse magnetoresistance in Au thin films on Y${}_3$Fe${}_5$O${}_{12}$
• Self-induced inverse spin Hall effect in ferromagnets: demonstration through non-monotonous temperature-dependence in permalloy
• Modeling the Oblique Spin Precession in Lateral Spin Valves for Accurate Determination of Spin Lifetime Anisotropy: Effect of Finite Contact Resistance and Channel Length
• Emergence of large spin-charge interconversion at an oxidized Cu/W interface
• Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents
• Interfacial mechanism in the anomalous Hall effect of Co/Bi${}_2$O${}_3$ bilayers
• Absence of Spin Hall Magnetoresistance in Pt/(CoNi)n multilayers
• Quantification of spin-charge interconversion in highly resistive sputtered Bi${}_x$Se${}_{1-x}$ with non-local spin valves
• Electronic Impurity Scattering Induced Spin Accumulation in Metallic Thin Films
• Gate-tunable charge-spin interconversion in graphene/heavy-metal heterostructures
• Large spin-charge interconversion induced by interfacial spin-orbit coupling in a highly conducting all-metallic system
• Measuring the magnetic anisotropy of the spin Hall effect and spin relaxation length in nickel and permalloy via electrical spin injection