SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 47: Skyrmions IV
MA 47.4: Vortrag
Freitag, 31. März 2023, 10:15–10:30, HSZ 04
On the correlation between spin, orbital and chiral magnetizations of skyrmions — Imara Lima Fernandes1 and •Samir Lounis1,2 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany — 2Faculty of Physics, University of Duisburg-Essen & CENIDE, 47053 Duisburg, Germany
Skyrmions are spin-swirling textures hosting wonderful properties with potential implications in information technology. The magnetization carried by such objects is prospected as a mean of encoding magnetic bits while their topological nature gives rise to a plethora of exquisite features such as topological protection, the skyrmion Hall effect, topological Hall effect and topological orbital moment [1]. Here, the emergent magnetic field, which is directly proportional to the three-spin scalar chirality χ, plays a key role. We explore from ab-initio the rich set of magnetizations carried by single small magnetic skyrmions generated in PdFe bilayer on Ir(111) surface and focus on the correlation between spin, orbital, chiral magnetizations and χ after being excited by single atomic defects [2]. We identify a universal pattern that can guide the design of storage devices by engineering the magnitude of the magnetization carried by skyrmions via controlled implantation of defects.
–Work funded by the Priority Programmes SPP 2137 “Skyrmionics” and SPP 2244 "2D Materials" of the DFG (Projects LO 1659/8-1 and LO 1659/7-1). [1] dos Santos Dias et al. Nat. Commun. 7, 13613 (2016); [2] Lima Fernandes et al. Nat. Commun. 9, 4395 (2018).