Stable hump-like Hall effect and non-coplanar spin textures in SrRuO${}_3$ ultrathin film

Abstract

We observed a hump-like feature in Hall effects of SrRuO${}_3$ ultrathin films, and systematically investigated it with controlling thicknesses, temperatures and magnetic fields. The hump-like feature is extremely stable, even surviving as a magnetic field is tilted by as much as 85${}^{\circ }$. Based on the atomic-level structural analysis of a SrRuO${}_3$ ultrathin film with a theoretical calculation, we reveal that atomic rumplings at the thin-film surface enhance Dzyaloshinskii-Moriya interaction, which can generate stable chiral spin textures and a hump-like Hall effect. Moreover, temperature dependent resonant X-ray measurements at Ru L-edge under a magnetic field showed that the intensity modulation of unexpected peaks was correlated with the hump region in the Hall effect. We verify that the two-dimensional property of ultrathin films generates stable non-coplanar spin textures having a magnetic order in a ferromagnetic oxide material.

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Cited by in corpus (10)

• Sign-tunable anomalous Hall effect induced by two-dimensional symmetry-protected nodal structures in ferromagnetic perovskite oxide thin films
• Observation of spin-dependent dual ferromagnetism in perovskite ruthenates
• Correlated Quantum Phenomena of Spin-Orbit Coupled Perovskite Oxide Heterostructures: Cases of SrRuO3 and SrIrO3-Based Artificial Superlattices
• Advances in Complex Oxide Quantum Materials Through New Approaches to Molecular Beam Epitaxy
• Thickness and temperature dependence of the atomic-scale structure of SrRuO${}_3$ thin films
• Evolution of electronic band reconstruction in thickness-controlled perovskite SrRuO${}_3$ thin films
• Electric control of two-dimensional Van Hove singularity in oxide ultra-thin films
• Symmetry-controlled SrRuO3/SrTiO3/SrRuO3 magnetic tunnel junctions:Spin polarization and its relevance to tunneling magnetoresistance
• Sign competing sources of Berry curvature and anomalous Hall conductance humps in topological ferromagnets
• Bounds and anomalies of inhomogeneous anomalous Hall effects