Multiscale analysis of magnetization dynamics driven by external fields

摘要

The multiscale approach to the magnetization dynamics driven by external magnetic fields is presented. In this approach, the Landau-Lifshitz equations are represented in an equivalent form, where the magnetic free energy is used as one of the state variables. This form clearly separates fast and slow dynamics and, consequently, it can be used for the development of perturbation and multiple scale techniques. Several applications of this approach to the precessional magnetization switching are discussed.