Regensburg 2019 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 34: Magnetic textures: Transport and dynamics II

MA 34.4: Talk

Wednesday, April 3, 2019, 16:00–16:15, H37

Impact of transition metals clusters on the stability and dynamics of skyrmions — Jonathan Chico, •Imara Lima Fernandes, I Gede Arjana, Stefan Blügel, and Samir Lounis — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, D-52425 Jülich, Germany

Magnetic skyrmions are prime candidates for future spintronic devices. However, incorporating them as possible information carriers hinges on their interaction with inhomogenities present in any device. Recently, it was shown that 3d and 4d single-atomic defects can either repel or pin skyrmions [1]. Using first-principles calculations in conjunction with atomistic spin dynamics, we investigate the complex motion of technologically relevant small skyrmions in Pd/Fe/Ir(111) with 3d and 4d transition metal single-atomic defects and clusters. The obtained dynamical behaviour is richer and goes beyond the expected from the Thiele equation. This allows us to study the impact of different types of defects on the skyrmions dynamics and the complexity of different motion regimes is revealed and compared with what is known for larger skyrmions. The present study may give guidance on how such defects can be used to engineer tracks for controlled skyrmion motion which is of great importance for the design of future spintronic devices. – Funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (ERC-consolidator grant 681405 - DYNASORE).
[1] I. Lima Fernandes. et al., Nat. Commun. 9, 4395 (2018).