Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 25: Skyrmions I (joint session MA/TT)

TT 25.7: Vortrag

Dienstag, 17. März 2020, 11:30–11:45, POT 6

Impact of light and heavy single atomic defects on single magnetic skyrmions — •Imara Lima Fernandes and Samir Lounis — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, D-52425 Jülich, Germany

Incorporating magnetic skyrmions as future bits of information technology is challenged by the unavoidable defects inherent to any device. Recently, the universality of the skyrmion-defect interaction profiles for the 3d and 4d elements was established [1], which is mainly dictated by the defect-induced changes in the magnetic exchange interactions. Those defects can be used to enhance the skyrmions detection using all-electrical means via the spin-mixing magnetoresistance (XMR) [2,3]. In the current study based on a full ab initio approach, we explore impurities from various parts of the periodic table, which enable different mechanisms determining the skyrmion-defect interactions. We address systematically the case of vacancies, sp and 5d elements in order to find correlations between their chemical nature and the energetics as well as the electronic properties of skyrmions generated in Pd/Fe/Ir(111) surface.
– Funding provided by 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., Nature Commun. 9, 4395 (2018).
[2] I. Lima Fernandes et al., arXiv:1906.08838, (2019)
[3] D. M. Crum et al., Nature Commun. 6, 8541 (2015)