Inductive detection of inverse spin-orbit torques in magnetic heterostructures

Abstract

The manipulation of magnetization via Magnetic torques is one of the most important phenomena in spintronics. In thin films, conventionally, a charge current flowing in a heavy metal is used to generate transverse spin currents and to exert torques on the magnetization of an adjacent ferromagnetic thin film layer. Here, in contrast to the typically employed heavy metals, we study spin-to-charge conversion in ferromagnetic heterostructures with large spin-orbit interaction that function as the torque-generating layers. In particular, we chose perpendicular magnetic anisotropy (PMA) multilayers [Co/Ni] and [Co/Pt] as the torque-generating layers and drive magnetization dynamics in metallic ferromagnetic thin film $\mathrm{C}{\mathrm{o}}_{20}\mathrm{F}{\mathrm{e}}_{60}{\mathrm{B}}_{20}$ (CoFeB) layers with in-plane magnetic anisotropy (IMA). We investigate the spin dynamics driven by spin-orbit torque (SOT) and the concomitant charge current generation by the inverse SOT process using an inductive technique based on a vector network analyzer. In our experimental findings, we find that the SOTs generated by our multilayers are of a magnitude comparable to those produced by Pt, consistent with first-principles calculations. Furthermore, we noted a significant correlation between the SOT and the thickness of the CoFeB layer.

References in corpus (33)

• Spin Hall effect
• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Wannier90 as a community code: new features and applications
• Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures
• Room Temperature Reversible Spin Hall Effect
• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Roadmap of spin-orbit torques
• Ab initio calculation of the anomalous Hall conductivity by Wannier interpolation
• Scaling of spin Hall angle in 3d, 4d and 5d metals from Y3Fe5O12/metal spin pumping
• Spin-orbit torques induced by interface-generated spin currents
• Spin torque study of the spin Hall conductivity and spin diffusion length in platinum thin films with varying resistivity
• Intrinsic spin Hall effect in platinum metal
• Intrinsic Spin and Orbital Hall Effects from Orbital Texture
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
• Interface-generated spin currents
• Observation of long-range orbital transport and giant orbital torque
• Maximally Localized Wannier Functions within the FLAPW formalism
• Theory of Current-Induced Angular Momentum Transfer Dynamics in Spin-Orbit Coupled Systems
• Inverse Spin Hall Effect from pulsed Spin Current in Organic Semiconductors with Tunable Spin-Orbit Coupling
• Observation of Spin-Orbit Effects with Spin Rotation Symmetry
• Experimental observation of a large ac-spin Hall effect
• Perspectives of Electrically generated spin currents in ferromagnetic materials
• Detection of long-range orbital-Hall torques
• Determination of spin Hall effect and spin diffusion length of Pt from self-consistent fitting of damping enhancement and inverse spin-orbit torque measurements
• Direct and inverse spin-orbit torques
• Phase-sensitive detection of spin pumping via the ac inverse spin Hall effect
• Inductive detection of field-like and damping-like AC inverse spin-orbit torques in ferromagnet/normal metal bilayers
• Detection of the dc inverse spin Hall effect due to spin pumping in a novel meander-stripline geometry
• Giant Inverse Rashba-Edelstein Effect: Application to Monolayer OsBi${}_2$
• Anomalous sign inversion of spin-orbit torque in ferromagnetic/nonmagnetic bilayer systems due to self-induced spin-orbit torque
• Effects of spin-orbit torque on the ferromagnetic and exchange spin wave modes in ferrimagnetic CoGd alloy
• Spin-orbit torques and their associated effective fields from gigahertz to terahertz
• Theory of inverse Rashba-Edelstein effect induced by spin pumping into a two-dimensional electron gas