Charge-spin current conversion in high quality epitaxial Fe/Pt systems: isotropic spin Hall angle along different in-plane crystalline directions

Abstract

We report the growth of MgO[001]//Fe(6 nm)/MgO(7 nm) and MgO[001]//Fe(6 nm)/Pt(6 nm) by molecular beam epitaxy and show that the full characterization by spin-orbit ferromagnetic resonance (SO-FMR) allows the determination of magnetic anisotropies as by classical FMR-only studies. The spin mixing conductance of epitaxial Fe/Pt interface was measured to be (1.5 +- 0.5)x10^19 m^2, and the effective spin Hall angle (SHA), was estimated at different in-plane crystalline directions. It was found that SHA is the same in all directions. When taking into account high enough excitation frequencies to achieve uniform precession of magnetization, the effective spin hall angle for epitaxial Pt in Fe/Pt is 0.051 +- 0.005. We address about the proper conditions to determine those relevant spintronics parameters.

arXiv comment11 pages, 4 figures

References in corpus (22)

• Spin torque switching with the giant spin Hall effect of tantalum
• Spin Hall effect
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
• Detection and quantification of inverse spin Hall effect from spin pumping in permalloy/normal metal bilayers
• Spin torque study of the spin Hall conductivity and spin diffusion length in platinum thin films with varying resistivity
• Interface control of the magnetic chirality in CoFeB|MgO heterosctructures with heavy metal underlayers
• Giant Spin Hall Effect Induced by Skew Scattering from Bismuth Impurities inside Thin Film CuBi Alloys
• Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime
• Spin-orbit driven ferromagnetic resonance: A nanoscale magnetic characterisation technique
• Evolution of the spin Hall effect in Pt nanowires: Size and temperature effects
• Interface enhancement of Gilbert damping from first-principles
• Electrical manipulation of a ferromagnet by an antiferromagnet
• Experimental evidences of a large extrinsic spin Hall effect in AuW alloy
• Spin Pumping and Inverse Spin Hall Effect in Germanium
• Direct evidence for minority spin gap in the Co2MnSi Heusler alloy
• Spin-memory loss due to spin-orbit coupling at ferromagnet/heavy-metal interfaces: Ab initio spin-density matrix approach
• Large enhancement of the spin Hall effect in Au by scattering with side-jump on Ta impurities
• Independence of spin-orbit torques from the exchange bias direction in Ni${}_{81}$Fe${}_{19}$/IrMn bilayers
• Optimizing the spin-pumping induced inverse spin Hall voltage by crystal growth in Fe/Pt bilayers

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