Abstract
We examine interfacial magnetic properties of ultra-thin 3d transition metal alloys deposited on a Pt underlayer. The interfacial Dzyaloshinskii-Moriya interaction (iDMI) and the interfacial perpendicular magnetic anisotropy (iPMA) are measured as a function of the average valence electron number per atom in 3d alloys from 25 (Mn) to 28 (Ni). Interestingly, both iDMI and iPMA exhibit the Slater-Pauling-like dependence on the electron number as the saturation magnetization does, and the three quantities are strongly correlated with each other. The iPMA and saturation magnetizations are calculated by virtual crystal approximation for FM monolayer alloys. We also calculated the iDMI, iPMA, and spin mixing conductance by employing tight binding single band model, by which the Slater-Pauling curve-like behaviors of iPMA and iDMI can be explained. Based on our finding, we claim that the strong correlation among the saturation magnetization, iPMA, and iDMI is manifested in a wide range of electron numbers.
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