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Nonlinear frequency and amplitude modulation of a nanocontact-based spin-torque oscillator
KTH, School of Information and Communication Technology (ICT), Material Physics.
KTH, School of Information and Communication Technology (ICT), Material Physics.
KTH, School of Information and Communication Technology (ICT), Material Physics.
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2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 14Article in journal (Refereed) Published
Abstract [en]

We study the current-controlled modulation of a nanocontact spin-torque oscillator. Three principally different cases of frequency nonlinearity (d(2)f/dI(dc)(2) being zero, positive, and negative) are investigated. Standard nonlinear frequency-modulation theory is able to accurately describe the frequency shifts during modulation. However, the power of the modulated sidebands only agrees with calculations based on a recent theory of combined nonlinear frequency and amplitude modulation.

Place, publisher, year, edition, pages
2010. Vol. 81, no 14
Keyword [en]
magnetic multilayers, microwave generation, polarized current, driven
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-19411DOI: 10.1103/PhysRevB.81.140408ISI: 000277210200018Scopus ID: 2-s2.0-77955188842OAI: oai:DiVA.org:kth-19411DiVA: diva2:337458
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Muduli, PranabaPogoryelov, YevgenBonetti, StefanoÅkerman, Johan
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