期刊
APPLIED PHYSICS LETTERS
卷 108, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4945685
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资金
- Foundation for Fundamental Research on Matter (FOM), Netherlands Organisation for Scientific Research (NWO)
- National Research Foundation of Korea [2015M3D1A1070467, 2013R1A1A2011936, 2015M2A2A6021171]
- National Research Foundation of Korea [2013R1A1A2011936] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The interfacial Dzyaloshinskii-Moriya interaction (iDMI), surface anisotropy energy, and spin pumping at the Ir/Co interface are experimentally investigated by performing Brillouin light scattering. Contrary to previous reports, we suggest that the sign of the iDMI at the Ir/Co interface is the same as in the case of the Pt/Co interface. We also find that the magnitude of the iDMI energy density is relatively smaller than in the case of the Pt/Co interface, despite the large strong spin-orbit coupling (SOC) of Ir. The saturation magnetization and the perpendicular magnetic anisotropy (PMA) energy are significantly improved due to a strong SOC. Our findings suggest that an SOC in an Ir/Co system behaves in different ways for iDMI and PMA. Finally, we determine the spin pumping effect at the Ir/Co interface, and it increases the Gilbert damping constant from 0.012 to 0.024 for 1.5 nm-thick Co. (C) 2016 AIP Publishing LLC.
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