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Spin-Wave-Mode Coexistence on the Nanoscale: A Consequence of the Oersted-Field-Induced Asymmetric Energy Landscape
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 110, no 25, 257202- p.Article in journal (Refereed) Published
Abstract [en]

It has been argued that if multiple spin wave modes are competing for the same centrally located energy source, as in a nanocontact spin torque oscillator, that only one mode should survive in the steady state. Here, the experimental conditions necessary for mode coexistence are explored. Mode coexistence is facilitated by the local field asymmetries induced by the spatially inhomogeneous Oersted field, which leads to a physical separation of the modes, and is further promoted by spin wave localization at reduced applied field angles. Finally, both simulation and experiment reveal a low frequency signal consistent with the intermodulation of two coexistent modes.

Place, publisher, year, edition, pages
American Physical Society , 2013. Vol. 110, no 25, 257202- p.
Keyword [en]
Asymmetric energy, Experimental conditions, Low-frequency signals, Physical separation, Spatially inhomogeneous, Spin-torque oscillators, Spin-wave mode, Wave localization
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-124975DOI: 10.1103/PhysRevLett.110.257202ISI: 000320645800019ScopusID: 2-s2.0-84879177932OAI: diva2:638946
Swedish Research CouncilSwedish Foundation for Strategic Research Knut and Alice Wallenberg Foundation

QC 20130805

Available from: 2013-08-05 Created: 2013-08-02 Last updated: 2013-08-05Bibliographically approved

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Redjai Sani, SohrabMohseni, Seyed MajidEklund, AndersÅkerman, Johan
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