Anomalous spin Hall angle of a metallic ferromagnet determined by a multiterminal spin injection/detection device

Abstract

We report on the determination of the anomalous spin Hall angle in the ferromagnetic metal alloy cobalt-iron (Co${}_{25}$Fe${}_{75}$, CoFe). This is accomplished by measuring the spin injection/detection efficiency in a multiterminal device with nanowires of platinum (Pt) and CoFe deposited onto the magnetic insulator yttrium iron garnet (Y${}_3$Fe${}_5$O${}_{12}$, YIG). Applying a spin-resistor model to our multiterminal spin transport data, we determine the magnon conductivity in YIG, the spin conductance at the YIG/CoFe interface and finally the anomalous spin Hall angle of CoFe as a function of its spin diffusion length in a single device. Our experiments clearly reveal a negative anomalous spin Hall angle of the ferromagnetic metal CoFe, but a vanishing ordinary spin Hall angle. This is in contrast to the results reported for the ferromagnetic metals Co and permalloy.

arXiv comment4 pages, 4 figures

References in corpus (20)

• Anomalous Hall effect
• Spin Hall effect
• Room Temperature Reversible Spin Hall Effect
• Long distance transport of magnon spin information in a magnetic insulator at room temperature
• Theory of spin Hall magnetoresistance
• Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids
• Ultra-low magnetic damping of a metallic ferromagnet
• Experimental test of the spin mixing interface conductivity concept
• Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
• Electronic control of the spin-wave damping in a magnetic insulator
• Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers
• Reorientable Spin Direction for Spin Current Produced by the Anomalous Hall Effect
• Magnon based logic in a multi-terminal YIG/Pt nanostructure
• Magnetic field dependence of the magnon spin diffusion length in the magnetic insulator yttrium iron garnet
• Spin Injection and Detection via the Anomalous Spin Hall Effect in a Ferromagnetic Metal
• Relation between spin Hall effect and anomalous Hall effect in 3$d$ ferromagnetic metals
• Spin diffusion length and polarization of ferromagnetic metals measured by spin-absorption technique in lateral spin valves
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Efficient injection and detection of out-of-plane spins via the anomalous spin Hall effect in permalloy nanowires
• Detection of induced paramagnetic moments in Pt on Y${}_3$Fe${}_5$O${}_{12}$ via x-ray magnetic circular dichroism

Cited by in corpus (5)

• Giant spin Hall angle in the Heusler alloy Weyl ferromagnet Co${}_2$MnGa
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Electrically induced angular momentum flow between separated ferromagnets
• Resonant Measurement of Non-Reorientable Spin-Orbit Torque from a Ferromagnetic Source Layer Accounting for Dynamic Spin Pumping
• Low Temperature Suppression of the Spin Nernst Angle in Pt