Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 40: Focus Session: Spinorbitronics – from efficient charge/spin conversion based on spin-orbit coupling to chiral magnetic skyrmions I (joint session MA/TT)

MA 40.2: Vortrag

Donnerstag, 15. März 2018, 10:00–10:15, H 1012

Impact of disorder on interfacial DMI for skyrmionics: intermixing and dusting — •Bernd Zimmermann¹, William Legrand², Nicolas Reyren², Vincent Cros², Stefan Blügel¹, and Albert Fert² — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, Germany — ²Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, Plaiseau, France

The spin-orbit (SOC) based Dzyaloshinskii-Moriya interaction (DMI) is of utmost importance for future nanotechnological devices, e.g. for the stabilization of small magnetic skyrmions in heterostructures such as magnetic multilayers. Additionally, the problematic role of disorder in such systems, e.g. leading to pinning of skyrmions, needs to be overcome making production processes tedious and expensive.

Here, we at first reveal from ab initio calculations for the important example of Co-Pt bilayers a surprisingly profound robustness of the DMI against interfacial intermixing. We incorporate disorder realistically by employing the coherent-potential approximation in combination with the Korringa-Kohn-Rostoker method. The robustness of DMI is a result of compensation, which turns out to follow simple arguments. We also explore the possibility to tune the DMI by dusting the interface with various impurities, including noble and transition metals, and elements with low and high SOC (bismuth and boron).

We acknowledge funding by a postdoc fellowship from DAAD, the EU’s H2020 FET-open project “MAGicSky”, and computing time on JURECA of JSC and JARA-HPC of RWTH Aachen University.