Hi,
While QuantumATK can be used to calculate parameters entering the LLG equation (spin transfer torque, Gilbert damping, magnetic moments, etc.) we currently do not have any modules for calculating the magnetization dynamics by solving the LLG equation. This part was implemented by the authors them-self in the cited paper. Notice also that the calculation of spin-orbit torque was implemented by the authors them-self.
Regards,
Troels