Structure and Magnetic Properties of Gd/Ti Nanoscale Multilayers
Structure and magnetic properties of nanoscale [Gd/Ti]n multilayers prepared by rf-sputtering are studied. It is found that the decrease in the Gd layer thickness LGd leads to beginning of the structure transformation in Gd layers from the fine-crystalline to amorphous state when LGd becomes less than 2 nm. The Curie temperature TC decreases as a function of the Gd layer thickness in the same way as in early studied epitaxially grown Gd films, i.e. in case for which the finite-size effect plays most important role. A deviation of the TC(LGd) behaviour at very low LGd from the fit according to the finite-size law is probably caused by the island-like structure of the Gd layers.
A. V. Svalov et al., "Structure and Magnetic Properties of Gd/Ti Nanoscale Multilayers", Solid State Phenomena, Vols. 168-169, pp. 281-284, 2011