Spin torque oscillator frequency versus magnetic field angle: The prospect of operation beyond 65 GHz
2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 94, no 10Article in journal (Refereed) Published
We study the impact of the magnetic field angle on the oscillation frequency of a nanocontact spin torque oscillator (STO) in magnetic fields up to 2.1 T. A model based on a single nonlinear, nonpropagating spin wave mode is found to explain the experimental data. We observe oscillation frequencies as high as 46 GHz in high magnetic fields applied normal to the film plane, and we are able to extrapolate the maximum expected operating frequency to beyond 65 GHz for in-plane magnetic fields. The STO signal remains surprisingly strong at these conditions, which opens up for possible millimeter-wave applications.
Place, publisher, year, edition, pages
2009. Vol. 94, no 10
cobalt alloys, copper, iron alloys, nanocontacts, nanoelectronics, nickel alloys, oscillators, spin valves, spin waves, microwave generation, driven, multilayers, emission
IdentifiersURN: urn:nbn:se:kth:diva-18250DOI: 10.1063/1.3097238ISI: 000264280000058ScopusID: 2-s2.0-62549110885OAI: oai:DiVA.org:kth-18250DiVA: diva2:336296
QC 201005252010-08-052010-08-052011-01-12Bibliographically approved