DW velocity of ferrimagnet

[Rishabh Verma]

Hi sir,

  I am currently simulating domain wall (DW) velocity in GdFeCo (a ferrimagnetic material) based on the paper DOI: 10.1038/NMAT4990. However, I am unable to replicate the temperature dependence of DW velocity shown in Figure 3b of the paper.

I have successfully modeled compensation magnetization and field-dependent DW velocity at a specific temperature using a two-sublattice model combining LLB and LLG equations, solved by the RKF45 method in BORIS.

When attempting to simulate DW velocity as a function of temperature at a fixed field, I am not observing the expected peak velocity at the angular momentum compensation point. I have also tried the stochastic Landau-Lifshitz-Bloch (sLLB) + LLG equation without success.

I would appreciate your guidance on this issue.