Magnetism of rare-earth–transition-metal nanoscale multilayers

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Abstract
Systematic studies have been performed on the layer-thickness dependence of magnetization and anisotropy for amorphous rare-earth–transition-metal compositionally modulated films with characteristic bilayer thicknesses (λ) in the 0.6–3-nm (6–30 Å) range. The results permit for the first time the development of a detailed model for the magnetization and perpendicular magnetic anisotropy as a function of λ. Single-ion anisotropy is shown to be the major contributor to the perpendicular anisotropy for Dy/Co and similar systems.