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Origin of the hump anomalies in the Hall resistance loops of ultrathin SrRuO3/SrIrO3 multilayers
- Source :
- Physical Review Materials. 5
- Publication Year :
- 2021
- Publisher :
- American Physical Society (APS), 2021.
-
Abstract
- The proposal that very small N\'eel skyrmions can form in ${\mathrm{SrRuO}}_{3}/{\mathrm{SrIrO}}_{3}$ epitaxial bilayers and that the electric field effect can be used to manipulate these skyrmions in gated devices strongly stimulated the recent research of ${\mathrm{SrRuO}}_{3}$ heterostructures. A strong interfacial Dzyaloshinskii-Moriya interaction was considered as the driving force for the formation of skyrmions in ${\mathrm{SrRuO}}_{3}/{\mathrm{SrIrO}}_{3}$ bilayers. Here, we investigated nominally symmetric heterostructures in which an ultrathin ferromagnetic ${\mathrm{SrRuO}}_{3}$ layer is sandwiched between large spin-orbit coupling ${\mathrm{SrIrO}}_{3}$ layers, for which the conditions are not favorable for the emergence of a net interfacial Dzyaloshinskii-Moriya interaction. Previously the formation of skyrmions in the asymmetric ${\mathrm{SrRuO}}_{3}/{\mathrm{SrIrO}}_{3}$ bilayers was inferred from anomalous Hall resistance loops showing humplike features that resembled topological Hall effect contributions. Symmetric ${\mathrm{SrIrO}}_{3}/{\mathrm{SrRuO}}_{3}/{\mathrm{SrIrO}}_{3}$ trilayers do not show hump anomalies in the Hall loops. However, the anomalous Hall resistance loops of symmetric multilayers, in which the trilayer is stacked several times, do exhibit the humplike structures, similar to the asymmetric ${\mathrm{SrRuO}}_{3}/{\mathrm{SrIrO}}_{3}$ bilayers. The origin of the Hall effect loop anomalies likely resides in unavoidable differences in the electronic and magnetic properties of the individual ${\mathrm{SrRuO}}_{3}$ layers rather than in the formation of skyrmions.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
Condensed matter physics
Skyrmion
Heterojunction
02 engineering and technology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
021001 nanoscience & nanotechnology
Coupling (probability)
Epitaxy
01 natural sciences
Condensed Matter::Materials Science
Ferromagnetism
Hall effect
Electric field
0103 physical sciences
Condensed Matter::Strongly Correlated Electrons
General Materials Science
010306 general physics
0210 nano-technology
Subjects
Details
- ISSN :
- 24759953
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- Physical Review Materials
- Accession number :
- edsair.doi...........c6ff51bfbe1afb9d7c9640b2f5ba10a2