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Magneto-optical observation of mutual phase-locking in a pair of spin-torque vortex oscillators
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.
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2015 (English)In: 2015 IEEE International Magnetics Conference, INTERMAG 2015, IEEE conference proceedings, 2015Conference paper (Refereed)Text
Abstract [en]

Nano-contact (NC) spin-torque vortex oscillators (STVOs) that share constituent ferromagnetic layers are anticipated to overcome the technological bottlenecks of low microwave power and phase instability exhibited by individual STVOs.1 Mutual synchronisation of multiple NC-STVOs can be achieved by dynamic coupling within the common magnetic layers.1,2 Alternatively, injection of a small microwave (RF) current can lock the phase of multiple STVOs.3 Direct observation of the coupled magnetization dynamics is challenging and has so far been inferred from micromagnetic simulations.4 In this work a combination of RF electrical characterization and time-resolved scanning Kerr microscopy (TRSKM) has been used to image the magnetization dynamics excited in the continuous film NiFe free layer of a pair of NC-STVOs.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2015.
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-181581DOI: 10.1109/INTMAG.2015.7156846ScopusID: 2-s2.0-84942474933ISBN: 9781479973224OAI: oai:DiVA.org:kth-181581DiVA: diva2:911253
Conference
2015 IEEE International Magnetics Conference, INTERMAG 2015, 11 May 2015 through 15 May 2015
Note

QC 20160311

Available from: 2016-03-11 Created: 2016-02-02 Last updated: 2016-03-11Bibliographically approved

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Redjai Sani, SohrabMohseni, SohailÅkerman, Johan
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