SMALL MOTIONS OF THE MAGNETIZATION
H. Suhl · Oxford University Press eBooks · 2007
In both their Cartesian and their polar forms, the equations of motion are nonlinear partial differential equations. In some situations, such as in ferromagnetic resonance at low signal levels, the magnetization vector precesses around a preferred direction with only a small angle of opening. In most applications, such as magnetic recording, the motion of the magnetization vector is large and the linearized theory is not immediately relevant. However, it frequently offers valuable insight into what to expect in more realistic situations. This chapter presents a brief sketch of the linear results and the attempts to go beyond them.