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Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Magnetic Textures: Statics and Imaging II

MA 41.1: Vortrag

Donnerstag, 4. April 2019, 09:30–09:45, H37

Tuning the chiral orbital magnetization of single magnetic skyrmions with atomic defects — •Imara Lima Fernandes and Samir Lounis — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, D-52425 Jülich, Germany

Magnetic skyrmions are localized topologically protected non-collinear spin textures with particle-like properties. Recently, an optical experimental was proposed to access the topological nature of skyrmions by measuring the orbital magnetic moment generated by the non-collinearity of the spin magnetic moments [1]. Such a chiral orbital moment is independent of the strength of spin-orbit interaction and acquires a topological nature for large skyrmions [1,2]. Following our previous work [3], we explore from a full ab initio approach the effect of 3d and 4d transition metal defects interacting with realistic single magnetic skyrmions generated in PdFe bilayer deposited on Ir(111). We investigated the two main factors contributing to the chiral/topological orbital magnetization of skyrmions, namely the intertwining of the electronic structure properties with the three spin scalar chirality and possibly higher order chiralities.
[1] M. dos Santos Dias et al., Nat. Comm. 7, 13613 (2016); [2] M. dos Santos Dias, S. Lounis, SPIE 10357, 103572A (2017); [3] I. Lima Fernandes et al., Nat. Comm. 9, 4395 (2018).
– Funding from the ERC under the European Union’s Horizon 2020 research and innovation programme (ERC-consolidator grant 681405 - DYNASORE).

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