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dc.contributor.authorLemesh, Ivan
dc.contributor.authorBeach, Geoffrey Stephen
dc.date.accessioned2020-09-09T14:17:09Z
dc.date.available2020-09-09T14:17:09Z
dc.date.issued2019-10
dc.date.submitted2019-08
dc.identifier.issn2331-7019
dc.identifier.urihttps://hdl.handle.net/1721.1/127211
dc.description.abstractCurrent-induced dynamics of twisted domain walls and skyrmions in ferromagnetic perpendicularly magnetized multilayers is studied through three-dimensional micromagnetic simulations and analytical modeling. It is shown that such systems generally exhibit a Walker-breakdown-like phenomenon in the presence of a current-induced dampinglike spin-orbit torque. Above a critical current threshold, corresponding to typical velocities of the order of tens of m/s, domain walls in some layers start to precess with frequencies in the gigahertz regime, which leads to oscillatory motion and a significant drop in mobility. This phenomenon originates from complex stray field interactions and occurs for a wide range of multilayer materials and structures that include at least three ferromagnetic layers and finite Dzyaloshinskii-Moriya interaction. An analytical model is developed to describe the precessional dynamics in multilayers with surface-volume stray field interactions, yielding qualitative agreement with micromagnetic simulations.en_US
dc.language.isoen
dc.publisherAmerican Physical Society (APS)en_US
dc.relation.isversionof10.1103/PHYSREVAPPLIED.12.044031en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAPSen_US
dc.titleWalker Breakdown with a Twist: Dynamics of Multilayer Domain Walls and Skyrmions Driven by Spin-Orbit Torqueen_US
dc.typeArticleen_US
dc.identifier.citationLemesh, Ivan and Geoffrey S.D. Beach. “Walker Breakdown with a Twist: Dynamics of Multilayer Domain Walls and Skyrmions Driven by Spin-Orbit Torque.” Physical Review Applied, 12, 4 (October 2019): 044031 © 2019 The Author(s)en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Materials Science and Engineeringen_US
dc.relation.journalPhysical Review Applieden_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2020-09-02T18:27:52Z
dspace.date.submission2020-09-02T18:27:55Z
mit.journal.volume12en_US
mit.journal.issue4en_US
mit.licensePUBLISHER_POLICY


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