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Direct observation and imaging of a spin-wave soliton with p-like symmetry
Stanford University, USA; SLAC National Accelerator Laboratory, USA.ORCID iD: 0000-0001-9352-2411
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2015 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 6, article id 8889Article in journal (Refereed) Published
Abstract [en]

Spin waves, the collective excitations of spins, can emerge as nonlinear solitons at the nanoscale when excited by an electrical current from a nanocontact. These solitons are expected to have essentially cylindrical symmetry (that is, s-like), but no direct experimental observation exists to confirm this picture. Using a high-sensitivity time-resolved magnetic X-ray microscopy with 50 ps temporal resolution and 35 nm spatial resolution, we are able to create a real-space spin-wave movie and observe the emergence of a localized soliton with a nodal line, that is, with p-like symmetry. Micromagnetic simulations explain the measurements and reveal that the symmetry of the soliton can be controlled by magnetic fields. Our results broaden the understanding of spin-wave dynamics at the nanoscale, with implications for the design of magnetic nanodevices.

Place, publisher, year, edition, pages
2015. Vol. 6, article id 8889
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:su:diva-140046DOI: 10.1038/ncomms9889PubMedID: 26567699OAI: oai:DiVA.org:su-140046DiVA, id: diva2:1077142
Funder
Knut and Alice Wallenberg Foundation
Available from: 2017-02-25 Created: 2017-02-25 Last updated: 2017-11-29Bibliographically approved

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