Inertial magnetization dynamics on femtosecond scale

Abstract

In the sub-picosecond to femtosecond time scale, the inertia effect should be considered in the dynamics of magnetization in ferromagnet, which can be described by the inertial Landau-Lifshitz-Gilbert equation. This paper mainly introduces some theoretical and experimental developments of ultrafast ferromagnetic resonance, magnetization reversal and inertial spin dynamics. These results will help to better understand the basic mechanism of ultrafast demagnetization and magnetization reversal, while it will deepen the understanding of the microscopic mechanism of magnetic inertia. Also, it will reveal the development trend of future experimental and theoretical research.