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Combined Wide-Narrow Double Modulation of Spin-Torque Oscillators for Improved Linewidth During Communication
2012 (English)In: IEEE Transactions on Magnetics, Vol. 48, no 11, 4077-4080 p.Article in journal (Refereed) Published
Abstract [en]

Spin-torque oscillators (STOs) offer the advantage of high modulation rates. However the existence of regions with high-frequency nonlinearity, accompanied by increased signal linewidth, limits both the usable STO frequency range and the minimum frequency of modulation. On the other hand, use of a large modulation frequency increases the frequency modulation (FM) bandwidth. In order to overcome these problems, we propose to simultaneously modulate the STO with two signals having different frequencies. We use a high-frequency, “wide” $(f_{rm W}=500 {rm MHz})$ , modulation signal to improve the STO linewidth. At the same time we use a low-frequency, “narrow” $(f_{rm N}=40 {rm MHz})$, modulation signal to show successful narrow bandwidth modulation of the improved STO signal. The proposed method of combined wide-narrow double modulation can significantly improve the usable operating frequency range of the STOs for communication applications.

Place, publisher, year, edition, pages
2012. Vol. 48, no 11, 4077-4080 p.
National Category
Condensed Matter Physics
URN: urn:nbn:se:uu:diva-215353DOI: 10.1109/TMAG.2012.2200465OAI: oai:DiVA.org:uu-215353DiVA: diva2:687035
Available from: 2014-01-13 Created: 2014-01-13 Last updated: 2014-01-13

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Pogoryelov, Ye.
Condensed Matter Physics

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