Effect of the interface resistance in non-local Hanle measurements

Abstract

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.

9 pages, 4 figures, Supplemental Material

References in corpus (5)

• Contact induced spin relaxation in Hanle spin precession measurements
• Contribution of defects to the spin relaxation in copper nanowires
• Modulation of pure spin currents with a ferromagnetic insulator
• Effect of anisotropic spin absorption on the Hanle effect in lateral spin valves
• Transition between 1D and 0D spin transport studied by Hanle precession

Cited by in corpus (5)

• Large room temperature spin-to-charge conversion signals in a few-layer graphene/Pt lateral heterostructure
• Synthetic antiferromagnetic coupling between ultra-thin insulating garnets
• Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
• Anisotropic Hanle lineshape via anisotropic magnetothermoelectric phenomena
• Modulation of Spin Accumulation by Nanoscale Confinement using Electromigration in a Metallic Lateral Spin Valve