Large spin Hall angle enhanced by nitrogen incorporation in Pt films

We report on the enhancement of spin Hall angle from CoFeB/Pt interface by introducing nitrogen into Pt thin film. Spin-torque ferromagnetic resonance measurements effective (?SH) reveal a non-monotonic variation as function amount gas introduced, Q in film deposition, which peaks at ?SH = 0.16 when is 8%. Our analysis shows that mainly attributed to increase spin-dependent scattering interface. The magnetic damping decreases with increasing due reduced spin–orbit coupling. interfacial transparency also observed show improvement after introduction nitrogen. Moreover, additional damping-like torque may lead linewidth modulation.