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Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact
SLAC National Accelerator Laboratory, USA; Stanford University, USA.ORCID iD: 0000-0001-9352-2411
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2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 115, no 12, article id 127205Article in journal (Refereed) Published
Abstract [en]

We report the direct observation of a localized magnetic soliton in a spin-transfer nanocontact using scanning transmission x-ray microscopy. Experiments are conducted on a lithographically defined 150 nm diameter nanocontact to an ultrathin ferromagnetic multilayer with perpendicular magnetic anisotropy. Element-resolved x-ray magnetic circular dichroism images show an abrupt onset of a magnetic soliton excitation localized beneath the nanocontact at a threshold current. However, the amplitude of the excitation ≃25° at the contact center is far less than that predicted (⪅180°), showing that the spin dynamics is not described by existing models.

Place, publisher, year, edition, pages
2015. Vol. 115, no 12, article id 127205
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Condensed Matter Physics
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URN: urn:nbn:se:su:diva-140048DOI: 10.1103/PhysRevLett.115.127205PubMedID: 26431016OAI: oai:DiVA.org:su-140048DiVA, id: diva2:1077144
Available from: 2017-02-25 Created: 2017-02-25 Last updated: 2017-11-29Bibliographically approved

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