Key Points in the Determination of the Interfacial Dzyaloshinskii–Moriya Interaction From Asymmetric Bubble Domain Expansion

Different models have been used to evaluate the interfacial Dzyaloshinskii–Moriya interaction (DMI) from asymmetric bubble expansion method using magneto-optics. Here, we investigate most promising candidates over a range of different magnetic multilayers with perpendicular anisotropy. Models based on standard creep hypothesis are not able reproduce domain wall (DW) velocity profile when DW roughness is high. Our results demonstrate that and interface sample layers correlated. Furthermore, give guidance how obtain reliable for DMI value this popular method. A comparison Brillouin light scattering (BLS) measurements same samples shows BLS approach often in higher measured values DMI.