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The hysteresis properties of [Tb-Co/Ti]n and [Tb-Co/Si]n multilayered films prepared by rf-sputtering were studied. The thickness of the Tb-Co layers was varied in the interval of 3 - 200 nm. X-ray reflectivity measurements confirmed the layered structure of the samples. SQUID measurements in a wide temperature range and magneto-optical measurements at room temperature revealed the complex mechanism of the magnetization reversal of Tb-Co films, including both the processes of magnetization rotation and the movement of the domain walls. [ABSTRACT FROM AUTHOR]

The influence of the thickness of the nanoscale ferrimagnetic Tb-Co layers on the magnetic properties of Tb-Co/Ti multilayers was studied. The fanning cone angle of Tb-Co sperimagnetic structure changes non-monotonously with a decrease of the Tb-Co layer thickness. The reason for this behavior of the fanning cone angle is discussed taking into account a possible reduction of the Co atom moment because of the electron charge transfer from atoms of the non-magnetic spacers to atoms of the transition metal. [ABSTRACT FROM AUTHOR]

The magnetic properties of the Dy-Co binary system thin films were studied. The compositional dependences of the residual magnetization, the coercivity in the ground state, and the magnetic ordering temperature were determined. The intervals of the compositions corresponding to the asperomagnetic and sperimagnetic structures are established. Within these structures, the dependence of the average magnetic moment per Dy atom was calculated, and the fan of the Dy magnetic moments was concluded to be narrowed monotonously with increasing Co content in the range of 20–80 at.%. [ABSTRACT FROM AUTHOR]