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Microwave resonances of magnetic skyrmions in thin film multilayers

Satywali, Bhartendu; Kravchuk, Volodymyr P.; Pan, Liqing; Raju, M.; He, Shikun; Ma, Fusheng; Petrović, A. P.; Garst, Markus; Panagopoulos, Christos

Abstract:
Non-collinear magnets exhibit a rich array of dynamic properties at microwave frequencies. They can host nanometre-scale topological textures known as skyrmions, whose spin resonances are expected to be highly sensitive to their local magnetic environment. Here, we report a magnetic resonance study of an [Ir/Fe/Co/Pt] multilayer hosting Néel skyrmions at room temperature. Experiments reveal two distinct resonances of the skyrmion phase during in-plane ac excitation, with frequencies between 6–12 GHz. Complementary micromagnetic simulations indicate that the net magnetic dipole moment rotates counterclockwise (CCW) during both resonances. The magnon probability distribution for the lower-frequency resonance is localised within isolated skyrmions, unlike the higher-frequency mode which principally originates from areas between skyrmions. However, the properties of both modes depend sensitively on the out-of-plane dipolar coupling, which is controlled via the ferromagnetic layer spacing in our heterostructures. The gyrations of stable isolated skyrmions reported in this room temperature study encourage the development of new material platforms and applications based on skyrmion resonances. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000131378
Veröffentlicht am 16.04.2021
Originalveröffentlichung
DOI: 10.1038/s41467-021-22220-1
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: 2041-1723
KITopen-ID: 1000131378
Erschienen in Nature Communications
Verlag Nature Research
Band 12
Heft 1
Seiten Art.-Nr.: 1909
Nachgewiesen in Scopus
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