ABSTRACT
This chapter provides an introductory account of superlattices in which one or both of the component materials are magnetic. The simplest case is a superlattice in which ferromagnetic and nonmagnetic layers alternate. The former authors calculated the magnetic Green functions as well as the dispersion relations in a semi-infinite superlattice, while the latter authors focused on the dispersion relations but included the case of a finite number of layers in the superlattice. The chapter considers only the dipole-dipole coupling between different magnetic layers that are often separated by a spacer. J. Barnas presents a very thorough treatment based on the transfer-matrix method that generalizes the formal results for a ferromagnetic/ferromagnetic superlattice in a number of ways. A further extension was made by C. G. Bezerra and M. G. Cottam to include the additional effects of biquadratic coupling across the interfaces in ferromagnetic/ferromagnetic superlattices.
