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Holographic Magnetic Imaging of Single-Layer Nanocontact Spin-Transfer Oscillators
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2016 (English)In: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 52, no 7, 6500304Article in journal (Refereed) PublishedText
Abstract [en]

Time-averaged images of the magnetization within single-layer spin-transfer oscillators have been obtained using the holography with extended reference by autocorrelation linear differential operator technique. Transport measurements on a Pd(5)-Cu(20)-Ni81Fe19(7)-Cu(2)-Pd(2) (in nanometers) stack with a 100 nm diameter nanocontact reveal the presence of vortex dynamics. Magnetic images of the device for injected current values of 24 and -24 mA suggest that a vortex has been ejected from the nanocontact and become pinned at the edge of the region that is visible through the Au mask.

Place, publisher, year, edition, pages
IEEE , 2016. Vol. 52, no 7, 6500304
Keyword [en]
holography with extended reference by autocorrelation linear differential operator (HERALDO), magnetic vortex, spin-transfer torque (STT), X-ray holography
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-190562DOI: 10.1109/TMAG.2016.2528959ISI: 000379924800132ScopusID: 2-s2.0-84977111259OAI: oai:DiVA.org:kth-190562DiVA: diva2:952801
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QC 20160815

Available from: 2016-08-15 Created: 2016-08-12 Last updated: 2016-08-15Bibliographically approved

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Sani, Sohrab RedjaiÅkerman, Johan
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Material Physics, MF
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