Abstract
Topological spin textures in an itinerant ferromagnet, SrRuO$_3$ is studied combining Hall transport measurements and numerical simulations. We observe characteristic signatures of the Topological Hall Effect associated with skyrmions. A relatively large thickness of our films and absence of heavy metal layers make the interfacial Dzyaloshinskii-Moriya interaction an unlikely source of these topological spin textures. Additionally, the transport anomalies exhibit an unprecedented robustness to magnetic field tilting and temperature. Our numerical simulations suggest that this unconventional behavior results from magnetic bubbles with skyrmion topology stabilized by magnetodipolar interactions in an unexpected region of parameter space.
Highlights
The interplay between magnetism and electronic transport, enabled by spin-orbit coupling, has been explored to the study of different phenomena such as the anomalous Hall effect (AHE) [1,2,3,4], anisotropic magnetoresistance [5,6], and the extrinsic and intrinsic spin Hall effect [7,8,9]
The atomic force microscopy (AFM) topology (Fig. S2) before and after the thin-film deposition reveals the presence of both TiO2 and SrO surface termination
Distinct features can be seen—the atypical AHE contribution corresponding to the magnetization of the films and its temperature dependence and the enhancement in transverse resistivity ρxy at higher fields manifested as humps in the ρxy loops
Summary
The interplay between magnetism and electronic transport, enabled by spin-orbit coupling, has been explored to the study of different phenomena such as the anomalous Hall effect (AHE) [1,2,3,4], anisotropic magnetoresistance [5,6], and the extrinsic and intrinsic spin Hall effect [7,8,9]. For an itinerant ferromagnet such as SRO, it is expected that the competition between different magnetic energies such as magnetocrystalline anisotropy, long-range magnetodipolar forces, and the interfacial Dzyaloshinskii-Moriya interaction (DMI), when appropriately tailored, can give rise to new magnetic textures. Such an interplay between magnetic energies in electronic transport was not addressed in experimental and in theoretical studies. This is quintessential for a comprehensive understanding of the origin of the THE and for their stabilization and manipulation by applied currents or electric fields. Findings, as well as the relatively high critical magnetic fields, are studied and related to the complex angular dependence of the magnetic anisotropy energy in our SRO films
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
