Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Magnetism Poster A

MA 15.16: Poster

Dienstag, 2. April 2019, 10:00–13:00, Poster E

Switching dependence of single skyrmions on in-plane magnetic field — Florian Muckel, •Christian Holl, Marco Pratzer, and Markus Morgenstern — II. Physikalisches Institut B, RWTH Aachen University and JARA-FIT, Germany

We study single skyrmions of about 5 nm in diameter, which are created by applying an out-of-plane magnetic field to the PdFe atomic bilayer on Ir(111) [1]. Using spin-polarized scanning tunneling microscopy at 7 K, we observe a current dependent switching of these skyrmions between different defect positions. The skyrmions are pinned eccentrically at its rim and flip, e.g., in angle around this pinning position exploiting additional defects. The switching rate can be tuned by about 2 orders of magnitude via an in-plane magnetic field of up to 3 T. We also employed high frequency excitation voltages up to 15 GHz to the pinned skyrmions without compelling results yet. The results are compared with micromagnetic simulations based on density functional theory calculations of the interaction potential between different adsorbates and the skyrmions [2].