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Resonant pinning spectroscopy with spin-vortex pairs
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics. National Academy of Sciences of Ukraine, Ukraine.
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.ORCID iD: 0000-0003-2339-1692
2018 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 97, no 9, article id 094406Article in journal (Refereed) Published
Abstract [en]

Vortex pairs in magnetic nanopillars with strongly coupled cores and pinning of one of the cores by a morphological defect, are used to perform resonant pinning spectroscopy, in which a microwave excitation applied to the nanopillar produces pinning or depinning of the cores only when the excitation is in resonance with the rotational or gyrational eigenmodes of the specific initial state of the core-core pair. The shift in the eigenmode frequencies between the pinned and depinned states is determined experimentally and explained theoretically, and illustrates the potential for multicore spin-vortex memory with resonant writing of information onto various stable vortex pair states. Further, it is shown how the same resonant spectroscopy techniques applied to a vortex pair can be used as a sensitive nanoscale probe for characterizing morphological defects in magnetic films.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 97, no 9, article id 094406
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-224680DOI: 10.1103/PhysRevB.97.094406ISI: 000426749400002Scopus ID: 2-s2.0-85044007173OAI: oai:DiVA.org:kth-224680DiVA, id: diva2:1193060
Funder
Swedish Research Council, 2014-4548
Note

QC 20180326

Available from: 2018-03-26 Created: 2018-03-26 Last updated: 2018-03-26Bibliographically approved

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Holmgren, ErikKorenivski, Vladislav

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