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| Home > Publications database > Strain vs. Spin-Orbit Coupling: Tuning Interfacial Magnetism in SrRuO3 Thin Films and Multilayers |
| Talk (non-conference) (Invited) | FZJ-2025-03834 |
2025
Abstract: Interfacial magnetism in complex oxide heterostructures provides a powerful platform to uncover emergent phenomena driven by strain, spin-orbit coupling (SOC), and broken inversion symmetry. In this talk, I will present two complementary studies on SrRuO3 (SRO)-based heterostructures that highlight different pathways to engineer interfacial magnetism. In the first part, I discuss strain-driven effects in SRO thin films grown on SrTiO3 (STO) and STO-buffered Si substrates. Structural and magnetic measurements reveal contrasting anisotropies: out-of-plane for SRO/STO and in-plane for SRO/STO/Si, while transport data indicate the presence of anomalous Hall effect (AHE) humps linked to multiple magnetic domains rather than a topological Hall effect (THE). In the second part, I focus on SRO/SrIrO3 (SIO) multilayers, where the strong SOC of SIO and broken inversion symmetry at the interface generate Dzyaloshinskii-Moriya interaction (DMI). These multilayers exhibit layer-dependent magnetization, anisotropic magnetoresistance, and signatures of an additional Hall contribution consistent with THE, after subtracting the AHE background. Together, these results emphasize how strain and SOC provide distinct routes to control interfacial magnetism in SRO systems. I will conclude by outlining future depth-resolved polarized neutron reflectometry (PNR) studies and magnetic force microscopy (MFM) imaging to directly probe the spatial magnetization profile and interfacial spin textures in these heterostructures.
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