Investigating emergent magnetic and electronic phenomena in oxide heterostructures using X-ray absorption spectroscopy

The study of oxide heterostructures has revealed emergent quantum phenomena arising from interfacial electronic and magnetic interactions. In this work, we investigate the anomalous Hall effect (AHE) in [(CaRuO₃)/(SrIrO₃)]₁₀ superlattices, where individual bulk components are non-magnetic but exhibit intriguing interfacial magnetism. Using pulsed laser deposition, we successfully fabricated epitaxial superlattices with precise control over layer thickness, revealing a systematic thickness-dependent magnetic anisotropy. To probe the underlying electronic and magnetic structure, we propose X-ray absorption spectroscopy (XAS), X-ray linear dichroism (XLD), and X-ray magnetic circular dichroism (XMCD) measurements at Ru and Ir edges. These techniques will provide element-specific insights into charge transfer, orbital hybridization, and spin-orbit coupling effects at the interface. Our results will enhance the understanding of interfacial magnetism and quantum transport in oxide heterostructures, with potential implications for future spintronic applications.