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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, article id 082402Article in journal (Refereed) Published
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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, article id 082402
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-185658DOI: 10.1063/1.4942398ISI: 000373057000026Scopus ID: 2-s2.0-84987640092OAI: oai:DiVA.org:kth-185658DiVA: diva2:923506
Funder
Swedish Foundation for Strategic Research Swedish Research Council
Note

QC 20160426

Available from: 2016-04-26 Created: 2016-04-25 Last updated: 2017-11-30Bibliographically approved

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Åkerman, Johan
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Material Physics, MF
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