Journal ArticleDOI
Thickness dependence of spin torque ferromagnetic resonance in Co75Fe25/Pt bilayer films
A. Ganguly,Kouta Kondou,Hiroaki Sukegawa,Seiji Mitani,Shinya Kasai,Yasuhiro Niimi,Yoshichika Otani,Anjan Barman +7 more
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TLDR
In this article, the spin Hall angle of Pt in Co75Fe25/Pt bilayer films was experimentally investigated by means of the spintorque ferromagnetic resonance and the modulation of damping measurements.Abstract:
The spin Hall angle of Pt in Co75Fe25/Pt bilayer films was experimentally investigated by means of the spin-torque ferromagnetic resonance and the modulation of damping measurements. By comparing the present results with the Ni80Fe20/Pt system, we found that the ferromagnetic layer underneath the Pt one greatly affects the estimation of the spin Hall angle. We also discuss the spin diffusion length of Pt and the ferromagnetic thickness dependence of the Gilbert damping coefficient.read more
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Spin Hall effects
TL;DR: In solid-state materials with strong relativistic spin-orbit coupling, charge currents generate transverse spin currents as discussed by the authors and the associated spin Hall and inverse spin Hall effects distinguish between charge and spin current where electron charge is a conserved quantity but its spin direction is not.
Journal ArticleDOI
Spin Torque Study of the Spin Hall Conductivity and Spin Diffusion Length in Platinum Thin Films with Varying Resistivity.
TL;DR: Measurements of the spin torque efficiencies in perpendicularly magnetized Pt/Co bilayers where the Pt resistivity ρ_{Pt} is strongly dependent on thickness t_Pt show consistent with an intrinsic spin Hall effect mechanism.
Journal ArticleDOI
Giant Spin Hall Effect and Switching Induced by Spin-Transfer Torque in a W / Co 40 Fe 40 B 20 / MgO Structure with Perpendicular Magnetic Anisotropy
Qiang Hao,Gang Xiao +1 more
TL;DR: In this paper, the authors have realized robust perpendicular magnetic anisotropy (PMA) in a layered structure combining the elusive, metastable $\ensuremath{\beta}$ phase of tungsten and a ferromagnetic thin film.
Journal ArticleDOI
Comparison of spin-orbit torques and spin pumping across NiFe/Pt and NiFe/Cu/Pt interfaces
Tianxiang Nan,Satoru Emori,Carl Boone,Xinjun Wang,Trevor M. Oxholm,John G. Jones,Brandon M. Howe,Gail J. Brown,Nian X. Sun +8 more
TL;DR: In this article, the authors investigate spin-orbit torques and spin pumping in NiFe/Pt bilayers with direct and interrupted interfaces and find that spin-current scattering at the NiFe-Pt interface contributes to additional enhancement in magnetization damping that is distinct from spin pumping.
Journal ArticleDOI
Determination of intrinsic spin Hall angle in Pt
TL;DR: In this paper, the intrinsic spin Hall angle of Pt was determined to be 0.068 at room temperature and was found to be almost constant in the temperature range of 13-300 K.
References
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Journal ArticleDOI
Spin-torque switching with the giant spin hall effect of tantalum
TL;DR: In this paper, a giant spin Hall effect (SHE) in β-tantalum was shown to generate spin currents intense enough to induce spin-torque switching of ferromagnets at room temperature.
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Observation of the spin Hall effect in semiconductors.
TL;DR: In this paper, the authors detected and imaged electron-spin polarization near the edges of a semiconductor channel with the use of Kerr rotation microscopy, consistent with the predictions of the spin Hall effect.
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Spin-Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
TL;DR: In this article, the spin Hall effect in a thin film with strong spin-orbit scattering can excite magnetic precession in an adjacent ferromagnetic film, and the ratio of these two signals allows a quantitative determination of the spin current and spin Hall angle.
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Spin Hall Effect in the Presence of Spin Diffusion
TL;DR: The spin Hall effect in the presence of spin diffusion from a semiclassical Boltzmann equation is derived, and the magnitude of the spin Hall voltage due to the spin accumulation is found to be much larger than that of magnetic multilayers.
Journal ArticleDOI
Magnetic nano-oscillator driven by pure spin current
Vladislav E. Demidov,Sergei Urazhdin,Henning Ulrichs,Vasyl S. Tiberkevich,Andrei Slavin,Dietmar Baither,Guido Schmitz,Sergej O. Demokritov +7 more
TL;DR: This work demonstrates the generation of single-mode coherent auto-oscillations in a device that combines local injection of a pure spin current with enhanced spin-wave radiation losses, and suggests a new route for the implementation of nanoscale microwave sources for next-generation integrated electronics.