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Title: Microwave resonances of magnetic skyrmions in thin film multilayers
Authors: Satywali, Bhartendu
Kravchuk, Volodymyr P.
Pan, Liqing
Raju, M.
He, Shikun
Ma, Fusheng
Petrović, Alexander Paul
Garst, Markus
Panagopoulos, Christos
Keywords: Science::Physics::Electricity and magnetism
Issue Date: 2021
Source: Satywali, B., Kravchuk, V. P., Pan, L., Raju, M., He, S., Ma, F., Petrović, A. P., Garst, M. & Panagopoulos, C. (2021). Microwave resonances of magnetic skyrmions in thin film multilayers. Nature Communications, 12(1), 1909-.
Project: NRF-NRFI2015-04 
Journal: Nature Communications 
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. Moreover, our material architecture enables the resonance spectra to be tuned, thus extending the functionality of such applications over a broadband frequency range.
ISSN: 2041-1723
DOI: 10.1038/s41467-021-22220-1
DOI (Related Dataset): 10.21979/N9/PPASA4
Schools: School of Physical and Mathematical Sciences 
Rights: © 2021 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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