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Transient dynamics of strongly coupled spin vortex pairs: Effects of anharmonicity and resonant excitation on inertial switching
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.
KTH. Natl Acad Sci, Kiev, Ukraine..
KTH.
Natl Acad Sci, Inst Magnetism, UA-03142 Kiev, Ukraine.;Natl Univ Sci & Technol MISiS, Moscow 119049, Russia..
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2018 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 112, no 19, article id 192405Article in journal (Refereed) Published
Abstract [en]

Spin vortices in magnetic nanopillars are used as GHz oscillators, with frequency however essentially fixed in fabrication. We demonstrate a model system of a two-vortex nanopillar, in which the resonance frequency can be changed by an order of magnitude, without using high dc magnetic fields. The effect is due to switching between the two stable states of the vortex pair, and we show that it can be done with low-amplitude fields of sub-ns duration. We detail the relevant vortex-core dynamics and explain how field anharmonicity and phase control can be used to enhance the performance.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2018. Vol. 112, no 19, article id 192405
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-228429DOI: 10.1063/1.5030855ISI: 000431980100026OAI: oai:DiVA.org:kth-228429DiVA, id: diva2:1210780
Note

QC 20180529

Available from: 2018-05-29 Created: 2018-05-29 Last updated: 2018-05-29Bibliographically approved

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Holmgren, ErikKorenivski, Vladislav

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