Spin Hall angle of rhodium and its effects on magnetic damping of Ni80Fe20 in Rh/Ni80Fe20 bilayer

We report the investigation of the spin Hall angle (SHA) of Rhodium (Rh) and the effective magnetic damping constant of Ni80Fe20 in Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system using Spin Torque Ferromagnetic Resonance (STFMR) spectroscopy and density functional theory based analysis. The filtered DC output voltages from Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system at different input signal frequencies and powers for a complete 360 degrees angle were measured. The average magnetic damping constant of Ni80Fe20 is found to be 0.017 and the angledependent study shows a 2-fold symmetry with the in-plane anisotropy field of 120 Oe. The SHA of Rh is found to be 0.2 %. The results agrees well with the calculations based on density functional theory where we found spin Hall conductivity (Sigma spinz 423PLANCK CONSTANT OVER TWO PI )(S/cm).

Automated summary

In this study, the spin Hall angle (SHA) of Rh and the effective magnetic damping constant of Ni80Fe20 in the Rh/Ni80Fe20 bilayer system were investigated using Spin Torque Ferromagnetic Resonance (STFMR) spectroscopy and density functional theory based analysis. The results showed that the average magnetic damping constant of Ni80Fe20 was 0.017 and the angle-dependent study exhibited a 2-fold symmetry with an in-plane anisotropy field of 120 Oe. The SHA of Rh was found to be 0.2%, which agreed well with the calculations based on density functional theory.