Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 4: Surface Magnetism: Atoms and Molecules
O 4.3: Vortrag
Montag, 7. März 2016, 11:00–11:15, S052
Electronic and magnetic properties of Au/Fe(001) bilayers epitaxially grown on MgO(001) — •Ewa Młyńczak1,2, Pika Gospodarič1, Markus Eschbach1, Mathias Gehlmann1, Sven Döring1, Lukasz Plucinski1, and Claus Michael Schneider1 — 1Peter Grünberg Institut PGI-6, Forschungszentrum Jülich, 52425 Jülich, Germany — 2Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
The electronic band structure of ferromagnetic films is a basis for magnetotransport phenomena, which are important for future spintronics, such as tunneling anisotropic magnetoresistance or spin-orbit torque (SOT). In the context of SOT, it is especially interesting to study the electronic structure of the interface between a ferromagnet (characterized by high exchange coupling) and a heavy metal (known for high spin-orbit coupling). In this study, ultrathin Au layers were deposited onto Fe(001)/MgO(001) thin film using different preparation conditions. The Au growth was monitored by recording changes of the film resistance with the deposition time. A laboratory based high-resolution angle resolved photoemission spectroscopy was used to study the near-surface electronic band structure. Spin detection was performed using a highly efficient spin polarimeter (FERRUM). It was possible to observe the development of the electronic bands characteristic for Au, while still having experimental access to the band structure of the underlying Fe(001). The magnetic properties of the bilayers were determined by in-situ anisotropic magnetoresistance measurements.