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Enhancement of spin-torque diode sensitivity in a magnetic tunnel junction by parametric synchronization
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2016 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 108, no 8, 082402Article in journal (Refereed) PublishedText
Abstract [en]

We demonstrate enhanced radio frequency (RF) detection sensitivity in a magnetic tunnel junction based spin torque oscillator (STO) using parametric synchronization. The parametric synchronization is observed above the auto-oscillation threshold of the STO and enhances the RF sensitivity at 2f(0), where f(0) is the auto-oscillation frequency. The maximum RF sensitivity for parametric synchronization at 2f(0) similar or equal to 9GHz is 16 mV/mW, while the maximum RF sensitivity at f(0) similar or equal to 4: 5GHz without parametric synchronization is 12 mV/mW. Macrospin simulations corroborate the experimental results.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. Vol. 108, no 8, 082402
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-185658DOI: 10.1063/1.4942398ISI: 000373057000026OAI: diva2:923506
Swedish Foundation for Strategic Research Swedish Research Council

QC 20160426

Available from: 2016-04-26 Created: 2016-04-25 Last updated: 2016-04-26Bibliographically approved

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Åkerman, Johan
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Material Physics, MF
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