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Detection of Topological Spin Textures via Nonlinear Magnetic Responses

Stepanova, M.; Masell, J.; Lysne, E.; Schoenherr, P.; Köhler, L. 1; Paulsen, M.; Qaiumzadeh, A.; Kanazawa, N.; Rosch, A. ORCID iD icon; Tokura, Y.; Brataas, A.; Garst, M. ORCID iD icon 1,2; Meier, D.
1 Institut für Theoretische Festkörperphysik (TFP), Karlsruher Institut für Technologie (KIT)
2 Institut für QuantenMaterialien und Technologien (IQMT), Karlsruher Institut für Technologie (KIT)


Topologically nontrivial spin textures, such as skyrmions and dislocations, display emergent electrodynamics and can be moved by spin currents over macroscopic distances. These unique properties and their nanoscale size make them excellent candidates for the development of next-generation race-track memory and unconventional computing. A major challenge for these applications and the investigation of nanoscale magnetic structures in general is the realization of suitable detection schemes. We study magnetic disclinations, dislocations, and domain walls in FeGe and reveal pronounced responses that distinguish them from the helimagnetic background. A combination of magnetic force microscopy (MFM) and micromagnetic simulations links the response to the local magnetic susceptibility, that is, characteristic changes in the spin texture driven by the MFM tip. On the basis of the findings, which we explain using nonlinear response theory, we propose a read-out scheme using superconducting microcoils, presenting an innovative approach for detecting topological spin textures and domain walls in device-relevant geometries.

Verlagsausgabe §
DOI: 10.5445/IR/1000142068
Veröffentlicht am 20.01.2022
DOI: 10.1021/acs.nanolett.1c02723
Zitationen: 3
Web of Science
Zitationen: 3
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für QuantenMaterialien und Technologien (IQMT)
Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1530-6984, 1530-6992
KITopen-ID: 1000142068
HGF-Programm 47.11.02 (POF IV, LK 01) Emergent Quantum Phenomena
Erschienen in Nano Letters
Verlag American Chemical Society (ACS)
Band 22
Heft 1
Seiten 14–21
Vorab online veröffentlicht am 22.12.2021
Schlagwörter chiral magnets; domain walls; FeGe; magnetic force microscopy; nonlinear magnetic response; spintronics; topological order
Nachgewiesen in Dimensions
Web of Science
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