ABSTRACT
Spin or magnetization dynamics and magnetic resonance phenomena are intimately related phenomena. They relate to the temporal evolution of the magnetization vector, or the assembly of spins in a magnetic system. Many developments on experimental methods have allowed the study of dynamics to evolve into more convenient forms and have also led to the discovery of ultrafast dynamics on the femtosecond time scale using ultrafast laser technologies. The treatment of the condition for the magnetic resonance of an atomic electron provides a basis for the general description of the case, where there is a cooperative interaction, which aligns the individual electronic moments in a ferromagnetic material. Mode intensities for the various types of standing spin-wave resonances are related to the transversal component of the magnetization across the film. The relaxation of the magnetization back to an equilibrium position has been treated by a number of approaches and outlines the more usual forms of treatment.
