Disentangling spin, anomalous and planar Hall effects in ferromagnetic/heavy metal nanostructures

Abstract

Ferromagnetic (FM)/heavy metal (HM) nanostructures can be used for the magnetic state readout in the proposed magneto-electric spin-orbit logic by locally injecting a spin-polarized current and measure the spin-to-charge conversion via the spin Hall effect. However, this local configuration is prone to spurious signals. In this work, we address spurious Hall effects that can contaminate the spin Hall signal in these FM/HM T-shaped nanostructures. The most pronounced Hall effects in our Co50Fe50/Pt nanostructures are the planar Hall effect and the anomalous Hall effect generated in the FM nanowire. We find that the planar Hall effect, induced by misalignment between magnetization and current direction in the FM wire, is manifested as a shift in the measured baseline resistance, but does not alter the spin Hall signal. In contrast, the anomalous Hall effect, arising from the charge current distribution within the FM, adds to the spin Hall signal. However, the effect can be made insignificant by minimizing the shunting effect via proper design of the device. We conclude that local spin injection in FM/HM nanostructures is a suitable tool for measuring spin Hall signals and, therefore, a valid method for magnetic state readout in prospective spin-based logic.

arXiv comment18 pages, 7 figures

References in corpus (20)

• Anomalous Hall effect
• Spin torque switching with the giant spin Hall effect of tantalum
• The design and verification of Mumax3
• New Perspectives for Rashba Spin-Orbit Coupling
• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Room Temperature Reversible Spin Hall Effect
• Emergent Phenomena Induced by Spin-Orbit Coupling at Surfaces and Interfaces
• Interface-Induced Phenomena in Magnetism
• Spin torque study of the spin Hall conductivity and spin diffusion length in platinum thin films with varying resistivity
• Indication of intrinsic spin Hall effect in 4d and 5d transition metals
• Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime
• Anisotropic Magnetoresistance Effects in Fe, Co, Ni, Fe_4N, and Half-Metallic Ferromagnet: A Systematic Analysis
• Spin-Polarized Tunneling Study on Spin-Momentum Locking in the Topological Insulators
• Unveiling the mechanisms of the spin Hall effect in Ta
• Spin-orbit magnetic state readout in scaled ferromagnetic/heavy metal nanostructures
• Large enhancement of the spin Hall effect in Au by scattering with side-jump on Ta impurities
• Spin diffusion length and polarization of ferromagnetic metals measured by spin-absorption technique in lateral spin valves
• Large room temperature spin-to-charge conversion signals in a few-layer graphene/Pt lateral heterostructure
• Determination of spin relaxation times in heavy metals via 2nd harmonic spin injection magnetoresistance

Cited by in corpus (8)

• Electrical control of magnetism by electric field and current-induced torques
• Voltage-based magnetization switching and reading in magnetoelectric spin-orbit nanodevices
• Spin-orbit readout using thin films of topological insulator Sb2Te3 deposited by industrial magnetron sputtering
• All-electrical spin-to-charge conversion in sputtered Bi${}_x$Se${}_{1-x}$
• Charge-induced artifacts in non-local spin transport measurements: How to prevent spurious voltage signals
• Quantum oscillations of the nonlinear planar effects signifying chiral anomaly in Weyl Semimetals
• Compact pulsed laser deposition system for in-situ polarized neutron reflectometry
• Gate-tunable charge-spin interconversion in graphene/heavy-metal heterostructures