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Magnetic droplet solitons in orthogonal nano-contact spin torque oscillators
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
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2014 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 435, 84-87 p.Article in journal (Refereed) Published
Abstract [en]

We study microwave signal generation as a function of drive current and applied perpendicular magnetic Field in nano contact spin torque oscillators (NC-STOs) based on orthogonal (pseudo) spin valves where the Co fixed layer has strong easy plane anisotropy, and the [Co/Nil free layer has a strong perpendicular magnetic anisotropy. The orthogonal NC-STOs exhibit a dramatic transition from the conventional ferromagnetic resonance like spin wave mode to a magnetic droplet solilon mode. In particular, the field and current dependence of the droplet solilon near threshold are discussed. Near threshold the droplet solilon undergoes complex dynamics that include mode hopping, as evident in the experimental frequency domain and rnagneloresislance response.

Place, publisher, year, edition, pages
2014. Vol. 435, 84-87 p.
Keyword [en]
Magnetic droplet soliton, Spin torque oscillators, Perpendicular magnetic anisotropy, Spin wave, Magnetoresistance
National Category
Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-141714DOI: 10.1016/j.physb.2013.10.023ISI: 000330134700021Scopus ID: 2-s2.0-84893691025OAI: oai:DiVA.org:kth-141714DiVA: diva2:698289
Funder
EU, FP7, Seventh Framework Programme, ICT-257159Swedish Foundation for Strategic Research Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20140221

Available from: 2014-02-21 Created: 2014-02-21 Last updated: 2017-12-05Bibliographically approved

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Mohseni, Seyed MajidRedjai Sani, SohrabNguyen, Thi Ngooc AhnChung, SunjaeÅkerman, Johan
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More styles
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  • de-DE
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