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The interfacial Dzyaloshinskii-Moriya interaction (iDMI), surface anisotropyenergy, and spin pumping at the Ir/Co interface are experimentally investigatedby performing Brillouin light scattering. Contrary to previous reports, wesuggest that the sign of the iDMI at the Ir/Co interface is the same as in thecase of the Pt/Co interface. We also find that the magnitude of the iDMI energydensity is relatively smaller than in the case of the Pt/Co interface, despitethe large strong spin-orbit coupling (SOC) of Ir. The saturation magnetizationand the perpendicular magnetic anisotropy (PMA) energy are significantlyimproved due to a strong SOC. Our findings suggest that an SOC in an Ir/Cosystem behaves in different ways for iDMI and PMA. Finally, we determine thespin pumping effect at the Ir/Co interface, and it increases the Gilbertdamping constant from 0.012 to 0.024 for 1.5 nmthick Co.

Interfacial Dzyaloshinskii-Moriya interaction, surface anisotropy energy,and spin pumping at spin orbit coupled Ir/Co interface