We investigated a possible correlation between spin Hall angles and exchange bias in $\mathrm{N}{\mathrm{i}}_{81}\mathrm{F}{\mathrm{e}}_{19}/\mathrm{IrMn}$ samples by performing spin-torque ferromagnetic resonance measurements. This correlation is probed by patterning of $\mathrm{N}{\mathrm{i}}_{81}\mathrm{F}{\mathrm{e}}_{19}/\mathrm{IrMn}$ bilayers in different relative orientations with respect to the exchange bias direction. The measured voltage spectra allow a quantitative determination of spin Hall angles, which are independent of the exchange bias orientation around $2.8\pm 0.3\%$.

• Received 4 April 2018
• Revised 11 July 2018

DOI:https://doi.org/10.1103/PhysRevB.98.094407