Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Magnetic Coupling Phenomena

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 [1]. 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.

[1] B. Sanyal et al., Phys. Rev. Lett. 104, 156402 (2010)