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Non-Degeneracy and Effects of Pinning in Strongly Coupled Vortex Pairs
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.
KTH. Institute of Magnetism, National Academy of Science, 03142 Kiev, Ukraine.
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.ORCID iD: 0000-0002-9993-4748
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2017 (English)In: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 53, no 11, article id 4400505Article in journal (Refereed) Published
Abstract [en]

We study the effects of pinning on the quasi-static behavior of stacked, strongly coupled spin-vortex pairs in magnetic multilayered nanopillars, with vertical vortex separation small compared with the vortex-core size. The small separation causes the core-core interaction to be the dominant energy contribution for small applied fields and excitations, which results in highly non-linear dynamics. The properties of such a vortex pair are expected to only be dependent on the relative vortex core polarizations and relative chiralities, so that the individual configurations should be degenerated. We show how pinning can lift this degeneracy, which can be used to distinguish the individual chirality configurations.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2017. Vol. 53, no 11, article id 4400505
Keyword [en]
Asymmetric synthetic antiferromagnets, spin vortices, vortex pinning
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-217736DOI: 10.1109/TMAG.2017.2697204ISI: 000413981300198Scopus ID: 2-s2.0-85032946588OAI: oai:DiVA.org:kth-217736DiVA, id: diva2:1159359
Conference
IEEE International Magnetics Conference (Intermag), APR 24-28, 2017, Dublin, IRELAND
Note

QC 20171122

Available from: 2017-11-22 Created: 2017-11-22 Last updated: 2017-11-22Bibliographically approved

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Holmgren, ErikKoop, BjörnKorenivski, Vladislav

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