Temperature dependence of spin polarization in ferromagnetic metals using lateral spin valves

Abstract

A high reproducibility in the performance of cobalt/copper and permalloy/copper lateral spin valves with transparent contacts is obtained by optimizing the interface quality and the purity of copper. This allows us to study comprehensively the spin injection properties of both ferromagnetic materials, as well as the spin transport properties of copper, which are not affected by the used ferromagnetic material, leading to long spin diffusion lengths. Spin polarizations of permalloy and cobalt are obtained as a function of temperature. Analysis of the temperature dependence of both the spin polarization and conductivity of permalloy using the standard two-channel model for ferromagnetic metals suggests that a correction factor of ~2 is needed for the spin polarization values obtained by lateral spin valve experiments.

16 pages, 5 figures, 1 table

References in corpus (6)

• Giant Spin Hall Effect Induced by Skew Scattering from Bismuth Impurities inside Thin Film CuBi Alloys
• Spin transport in high quality suspended graphene devices
• Control of spin injection by direct current in lateral spin valves
• Contribution of defects to the spin relaxation in copper nanowires
• An investigation of the inverted Hanle effect in highly-doped Si
• Spin-dependent Seebeck effect in non-local spin valve devices

Cited by in corpus (25)

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• Temperature dependence of spin diffusion length and spin Hall angle in Au and Pt
• A two-dimensional spin field-effect transistor
• Electrical detection of the spin polarization due to charge flow in the surface state of the topological insulator Bi_1.5 Sb_0.5 Te_1.7 Se_1.3
• Electrical and Thermal Generation of Spin Currents by Magnetic Graphene
• Current-Driven Dynamics of Magnetic Hopfions
• Origin of inverse Rashba-Edelstein effect at Cu/Bi interface using lateral spin valves
• Unveiling the mechanisms of the spin Hall effect in Ta
• Spin superfluidity and long-range transport in thin-film ferromagnets
• Intrinsic and extrinsic contributions to spin scattering in Pt
• Synthetic antiferromagnetic coupling between ultra-thin insulating garnets
• Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets
• Drastic emergence of huge negative spin-transfer torque in atomically thin Co layers
• Modulation of pure spin currents with a ferromagnetic insulator
• Spin relaxation through Kondo scattering in Cu/Py lateral spin valves
• Intra-wire coupling in segmented Ni/Cu nanowires deposited by electrodeposition
• A seamless graphene spin valve based on proximity to van der Waals magnet Cr${}_2$Ge${}_2$Te${}_6$
• Direct Evidence for Suppression of the Kondo Effect due to Pure Spin Current
• Conservation of spin supercurrents in superconductors
• Electrical detection of surface spin polarization of candidate topological Kondo insulator SmB6
• 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
• Effect of the interface resistance in non-local Hanle measurements
• Electrical detection of the inverse Edelstein effect on the surface of SmB${}_6$
• Modulation of Spin Accumulation by Nanoscale Confinement using Electromigration in a Metallic Lateral Spin Valve