Regensburg 2016 – wissenschaftliches Programm
MA 41.2: Vortrag
Donnerstag, 10. März 2016, 09:45–10:00, H33
Tailoring the magnetic moment of Fe/3d metal/Gd trilayers by varying thenumber of 3d transition metal spacer layers — •Dirk Walecki1, P. Anil Kumar1, Samira Webers1, Carmine Autieri2, Mark Gubbins3, Biplab Sanyal2, and Heiko Wende1 — 1Faculty of Physics and CENIDE, University of Duisburg-Essen, Germany — 2Department of Physics and Astronomy, Uppsala University, Sweden — 3Seagate Technology, Springtown Industrial Estate, Derry, UK
We investigate the magnetic coupling between ultrathin Fe and Gd layers via an anti- or non-magnetic spacer layer by means of conventional magnetometry methods. Interlayer exchange coupling in alternating ferromagnetic/non-magnetic superlattice structures was explored extensively in the past but there is only little known about the coupling behaviour between high-moment lanthanides and 3d transition metals with high Curie temperatures. A ferromagnetic coupling between Fe and Gd has already been established in 2010 by employing five monolayers of Cr as interlayer . Following up these results we employed Sc and Mn as a spacer material to mediate the coupling between Fe and Gd. Since the theory predicts short-period oscillations to occur, a high accuracy in preparing the trilayers is required. For this purpose we make use of a molecular beam epitaxy system.
 B. Sanyal et al., Phys. Rev. Lett. 104, 156402 (2010)