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MA: Fachverband Magnetismus

MA 29: Skyrmions II

MA 29.1: Vortrag

Mittwoch, 19. März 2025, 15:00–15:15, H20

Emergent electromagnetic inductance of interface skyrmions in SrRuO₃/SrIrO₃ bilayers — •Ludwig Scheuchenpflug¹, Sebastian Esser², Robert Gruhl¹, Max Hirschberger^2,3, and Philipp Gegenwart¹ — ¹Universität Augsburg, Lehrstuhl für Experimentalphysik VI — ²Department of Applied Physics, University of Tokyo, Japan — ³RIKEN Center for Emergent Matter Science, Japan

Emergent electromagnetic induction (EEMI) by current-driven spin dynamics was proposed and observed in the spin helix magnet Gd₃Ru₄Al₁₂ [1], where the (current-nonlinear) imaginary impedance at kHz frequency was associated with the motion of helical spin structures. To explore the possibility of EEMI arising from current-driven skyrmion dynamics, we fabricated and microstructured epitaxial thin film bilayers of ferromagnetic SrRuO₃ and paramagnetic SrIrO₃ on SrTiO₃. This bilayer system is known to host DMI-stabilized Néel-skyrmions, indicated by the topological Hall-effect (THE) [2]. We reproduce the THE signatures and observe an accompanying large and current-linear imaginary impedance at low temperatures over broad current density and frequency ranges, signaling the EEMI from the low-energy dynamics of pinned interface skyrmions.

[1] Naoto Nagaosa, Jpn. J. Appl. Phys. 58, 120909 (2019), Yokouchi et al., Nature 586, 232 (2020).

[2] J. Matsuno et al., Science Adv. 2, e1600304 (2016), S. Esser et al., Phys. Rev. B 103, 214430 (2021).

Keywords: Skyrmion; Emergent electromagnetic induction; Skymrion Dynamics; heterostructures; transition metal oxides