2017/09/12 by Xin Ma, Guoqiang Yu, Chi Tang +5
Materials Science · Physics and Astronomy · #Brillouin zone #Condensed matter physics #Dispersion (optics) #Ferromagnetism #Magnetic properties of thin films #Materials science #Optics #Physics #Physics of Superconductivity and Magnetism #Spintronics #ZnO doping and properties #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.120.157204
published as Phys. Rev. Lett. 120, 157204 (2018)
arxiv created 2017/09/12 · openalex created_date 2017/09/25 · openalex publication_date 2018/04/13 · arxiv updated 2018/04/17 · openalex updated_date 2026/08/05
The Dzyaloshinskii-Moriya interaction (DMI) at the heavy metal (HM) and ferromagnetic metal (FM) interface has been recognized as a key ingredient in spintronic applications. Here we investigate the chemical trend of DMI on the 5d band filling (5d3-5d10) of the HM element in HM/FM (FM=CoFeB,Co)/MgO multilayer thin films. DMI is quantitatively evaluated by measuring asymmetric spin wave dispersion using Brillouin light scattering. Sign reversal and 20 times modification of the DMI coefficient D have been measured as the 5d HM element is varied. The chemical trend can be qualitatively understood by considering the 5d and 3d bands alignment at the HM/FM interface and the subsequent orbital hybridization around the Fermi level. Furthermore, a correlation is observed between DMI and effective spin mixing conductance at the HM/FM interfaces. Our results provide new insights into the interfacial DMI for designing future spintronic devices.