Erratum: Spin Hall torques generated by rare-earth thin films [Phys. Rev. B 
<b>95</b>
, 064412 (2017)]

Reynolds, Neal; Jadaun, Priyamvada; Heron, John T.; Jermain, Colin; Gibbons, Jonathan; Collette, Robyn; Buhrman, R. A.; Schlom, D. G.; Ralph, D. C.

doi:10.1103/physrevb.100.169901

Cited by 10 publications

(13 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By measuring R, L/Rw as a function of t was plotted in Fig. 1(d), showing a linear trend with increase of the t. From the linear fitting to the data, we estimate resistivities of IrO2 and Py layers to be IrO2 = 370 cm and Py = 85 cm, in agreement with previous reports [19,24,25,27]. Assuming the parallel resistor model with these resistivities, the current fraction versus t [28] was obtained in order to calculate an accurate current density flowing in IrO2.…”

supporting

confidence: 88%

“…These phenomena have been first demonstrated in 5d heavy metal (HM)/ferromagnet (FM) bilayers due to the strong SOC of the 5d electrons. The study on SOT has been further extended to a variety of bilayers such as antiferromagnet/FM [14,15], topological insulator/FM [16,17], rare earth metal/FM [18,19], and HM/ferrimagnet [20][21][22]. Thus, the SOT has been well established as a powerful tool to investigate the charge to spin current conversion in various material systems.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Spin-orbit torque generation in NiFe/IrO2 bilayers

et al. 2020

View full text Add to dashboard Cite

5d transition-metal oxides have a unique electronic structure dominated by strong spinorbit coupling and hence they can be an intriguing platform to explore spin-current physics. Here, we report on room-temperature generation of spin-orbit torque (SOT) from a conductive 5d iridium oxide IrO2. By measuring second harmonic Hall resistance of Ni81Fe19/IrO2 bilayers, we find both dampinglike and fieldlike SOTs. The former is larger than the latter, enabling an easier control of magnetization. We also observe that the dampinglike SOT efficiency has a significant dependence on IrO2 thickness, which is well described by the drift-diffusion model based on the bulk spin Hall effect. We deduce the effective spin Hall angle of +0.093 ± 0.003 and the spindiffusion length of 1.7 ± 0.2 nm. By the comparison with control samples Pt and Ir, we show that the effective spin Hall angle of IrO2 is comparable to that of Pt and 7 times higher than that of Ir.The fieldlike SOT efficiency has a negative sign without appreciable dependence on the thickness, in contrast to the dampinglike SOT. This suggests that the fieldlike SOT is likely stemming from the interface. These experimental findings suggest that the uniqueness of electronic structure of 5d transition-metal oxides is crucial for highly efficient charge to spin current conversion.

show abstract

supporting

confidence: 88%

mentioning

confidence: 99%

Spin-orbit torque generation in NiFe/IrO2 bilayers

et al. 2020

View full text Add to dashboard Cite

show abstract

“…This principle is also applicable to f-electron systems, where researchers have found that rare-earth elements near 1/4 and 3/4 f-orbital fillings (e.g. Ho) have stronger spin Hall effect than other f-electron elements [18].…”

Section: Introductionmentioning

confidence: 99%

Inverse spin Hall effect in AuxTa1−x alloy films

Huang

Guo

et al. 2018

Phys. Rev. B

View full text Add to dashboard Cite

Gold (Au) and tantalum (Ta) metals are two important spin Hall materials with diametrically different crystalline structure, resistivity, and spin Hall angle. By vapor quenching, Au x Ta 1-x alloys of different crystalline and amorphous structures, stable and metastable, have been formed over the entire composition range. We have studied the inverse spin Hall voltage induced by the longitudinal spin Seebeck effect in Au x Ta 1-x alloy films. We have found that the inverse spin Hall voltage ΔV ISHE , resistivity ρ , and the spin Hall angle θ SH vary smoothly with composition. Both the spin Hall angle and the spin Hall conductivity exhibit a quasi-linear dependence on composition in the concentrated alloy regime, despite drastic differences in other properties. As corroborated by first-principle calculation, we show the contribution to spin Hall effect in Au x Ta 1-x alloy is dominated by the number of valence electrons. We also show that the magnetoresistance correlates with the spin Hall angle.

show abstract

“…From the fitting, we extracted the resonance field H FMR and linewidth W of CoFeB and studied their electric-field dependence at different frequencies and magnetic field angles. It has been reported that the amplitudes of the symmetric and antisymmetric Lorentzians are proportional to the damping-like torque and field-like torque, respectively, which have been used to estimate the efficiency of SOTs [13,36,37] . However, the results may depend on the calibration of microwave currents [13,38] and a thermoelectric voltage peak at resonance [39] .…”

mentioning

confidence: 99%