Articles you may be interested inStructure and magnetism of epitaxial rare-earth-transition-metal films J. Appl. Phys. 81, 5637 (1997); 10.1063/1.364845 Disclinations and magnetism in rareearth-transitionmetal hard magnets J. Appl. Phys. 61, 3580 (1987); 10.1063/1.338707 Microstructure and magnetism in amorphous rareearth-transitionmetal thin films. II. Magnetic anisotropy Microstructure and magnetism in amorphous rareearth-transitionmetal thin films. I. MicrostructureWe study exchange coupling in rare-earth/transition-metal multilayers in which one layer has perpendicular magnetization and a second layer has in-plane magnetization at room temperature. The exchange coupling between these layers is mediated by a thinner intermediate layer, and we investigate the dependence of the exchange on the magnetic properties of this intermediate layer from room temperature through the compensation and Curie temperatures of the layers. The structures of interest consist of a 400 Å TbFeCo layer with perpendicular magnetization, a 400 Å GdFeCo layer with in-plane magnetization, and a GdFe intermediate layer of variable composition and thickness. The results indicate that the structures are well-described by either a two-layer or a three-layer coherent rotation model ͑depending on intermediate-layer thickness͒ and that the influence of the intermediate layer is a function of its anisotropy energy, its thickness, and the identity of its dominant atomic moment.
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