Magnetic Resonance in Ferrites

Ferromagnetic resonance in ferrites is reviewed. The concept of tensor permeability, the influence of magnetic anisotropy, demagnetizing fields, and damping mechanisms are discussed. Special consideration is given to coupled magnetic systems and the behavior in ferrites with compensation points. The general theoretical results are compared with a few illustrative examples. The behavior in polycrystalline material, g-value, line width, and anisotropy as a function of temperature and external magnetic field are outlined.