Relativistic theory of magnetic inertia in ultrafast spin dynamics

Relativistic theory of magnetic inertia in ultrafast spin dynamics.
Ritwik Mondal, Marco Berritta, Ashis K. Nandy, and Peter M. Oppeneer
Phys. Rev. B 96, 024425 (2017)

Schematic illustration of magnetization dynamics. The precessional motion of M around Heff

 is depicted by the blue solid-dashed curve, and the nutation is shown by the red curve.