Micromagnetic modeling of skyrmion and domain wall dynamics in Pt/TmIG systems

We present investigation of skyrmion and domain wall formation and dynamics in Pt/Tm₃Fe₅O₁₂(TmIG) bilayers. In the system domain wall and skyrmion motion is driven by Spin Hall Effect (SHE) induced by the electric current flowing in the Pt layer. Micromagnetic modeling is done using the magnetic parameters determined specifically for the Pt/TmIG bilayers grown at the Ohio State University. The parameters used in micromagentic modeling were experimentally measured on the grown films using a broad range of experimental techniques including, but not limited to, Ferromagnetic Resonance, SQUID Magnetometry and topological Hall measurements. The modeling is done using both the commercially available and the custom developed software. The objective of the investigation is to determine the path to achieving high velocities of skyrmion motion. We compare our modeling results with the results of Magnetic Force Microscopy and Magneto-Optical Kerr Effect microscopy measurements.